Manga list: o
- Oversimplified SCP
- Ookiku Furikabutte
- One Piece
- One Punch-Man
- Ojousama no Shimobe
- Onepunch-Man (ONE)
- Otome no Teikoku
- Oh! Lord Jesus
- Only Sense Online
- Ookami-heika no Hanayome
- Owari no Serafu
- Ouroboros
- Omaera Zenin Mendokusai!
- Otome Holic
- Otonari Complex
- Orenchi ni Kita Onna Kishi to Inakagurashi Surukotoninatta Ken
- Ore no Kouhai ga Konna ni Kawaii Wake ga Nai
- Ore no Kanojo ni Nanika Youkai
- Oresama Teacher
- Okusama ga Seito Kaichou!
- Origin
- Online - The Comic
- Ore to Kawazu-san no Isekai Hourouki
- Oretachi no Party wa Machigatteiru
- Ojojojo
- Oshiete! Gyaru-ko-chan
- Ore no Genjitsu wa Ren’ai Game?? ka to Omottara Inochigake no Game datta
- Oddman 11
- Onimote
- Okusama wa Joshi Kousei
- Okusan
- Overgeared
- Ore ga Ojou-sama Gakkou ni
- Ozanari Dungeon
- Opapagoto
- Otome wa Oneesama ni Koishiteru: Futari no Elder
- Oomuroke
- Okitenemuru
- Omae o Otaku ni Shiteyaru kara, Ore o Riajuu ni Shitekure!
- Ougon no Ringo
- Over Drive
- Orera Kourin! Ai toka Koi toka Sekai toka
- Otome Sensou
- Ookami Shounen wa Kyou mo Uso o Kasaneru
- Ouke no Monshou
- Ohana Holoholo
- Oishii Kamishama
- Ore to Ichino no Game Doukoukai Katsudou Nisshi
- Omega Complex
- Ocha Nigosu
- Okasu Bekarazu!! Junketsu Tokku!
- Onideka
- Ouji ka Prince
- Omairi desu yo
- Ore to Akuma no Blues
- Ohoshisama ni Onegai!
- Ore ga Heroine o Tasukesugite Sekai ga Little Mokushiroku!?
- Over Rev!
- Otometeki Syndrome
- Obaka-chan, Koigatariki
- Orpheus no Mado
- Ookami ni Kuchizuke
- Ore no Ie ga Maryoku Spot datta Ken – Sundeiru dake de Sekai Saikyou
- Osu!! Karate Bu
- Osomatsu-kun
- Otouto ja Irarenai!!
- Ookami Shoujo to Kuro Ouji
- Ookami no Kuchi: Wolfsmund
- Onani Master Kurosawa
- Otome, Sakazu ni Chiru na Kare
- Oto X Maho
- Ouran High School Host Club
- Otome Youkai Zakuro
- Oniichan no Koto Nanka Zenzen Suki ja Nai n da kara ne!!
- Ookami-san to Shichinin no Nakamatachi
- Otomentaru
- Oniichan Control
- Oh, My Romantic Kumiho
- Ousama ni Kiss!
- Otokogokoro
- Okama Report
- Orange Chocolate
- Odette
- Oz - Tokiya Seigo
- Otoko no Ko ni Toriko
- Ore Ga Ojou-sama Gakkou Ni
- Otoko no Issho
- Orange Marmalade
- Oukoku Game
- Oldman
- Oboreru Knife
- Oniichan dakedo Ai Sae Areba Kankeinai yo ne
- Odyssey
- Oda Nobuna no Yabou
- Otasuke Miko Miko-chan
- Otome Ouji
- Ore Monogatari!!
- Orurerian no Kishi-Hime
- Outlaw Star
- O.L.D
- Ochitekita Ryuuou to Horobiyuku Majo no Kuni
- Onihime VS
- Ou-sama Game - Kigen
- Otogimoyou Ayanishiki Futatabi
- Otomodachi kara Hajimemashou.
- Oniichan no Koto ga Suki Sugite Nyan Nyan Shitai Burakon Imouto dakedo Sunao ni Narenai no
- Omoni Naitemasu
- Over Steam
- Omake no Kobayashi-kun
- Otoko O Misete Yo Kurata-kun!
- Only You
- Onsen Yousei Hakone-chan
- Omoino-Kakera
- Ore to Kanojo no Moe yo Pen
- Orange (TAKANO Ichigo)
- Otameshi RPG
- Onedari Girl
- Oumagadoki Doubutsuen
- Orenchi no Furo Jijou
- Oyome ni Ikenai!
- Otokonoko ni wa Himitsu ga Aru
- Oiran Girl
- Oh, Chunja Chunja! High School Bullying
- Ou-sama wa Shitsuji-sama
- Okobore Hime to Entaku no Kishi
- Omae de Nakya Dame Mitai
- One Piece - Digital Colored Comics
- Oath to Love & Passion
- Ousama to Fushigi no Shiro
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Oinarisama no Honey Bunny
- Ouji to Majou to Himegimi to
- Omukae Desu
- Ore no Pantsu ga Nerawareteita.
- Ore no Pantsu ga Nerawareteita
- Ouji to Hero
- Oshiete, Kurogane-kun
- Oto Koi
- Omocha no Kyouso-sama
- Onnanoko ga Shinu Hanashi
- One Piece - Pipipi
- One Piece - Not Yet Dead in the Water
- Overdose
- Otouto wa, Ookami.
- Otodokeshimasu
- Osen
- Orthoros
- Oooku
- Onigami
- Oneshots
- Onegai Twins
- One
- Omukae desu.
- Ometura
- Ocean
- One Piece (Databook)
- One Piece: Strong World
- One Piece - Return to Innocence (Doujinshi)
- One Piece x Toriko
- Oz to Mahoutsukaitachi
- Ozmafia!!
- Oyayubi Hime
- Oyasumi Punpun
- Oyaji Hiroimashita
- Oyajina!
- Oyaji
- Owaru Heart Janee
- Over Image
- Over Fence
- Outlanders
- Ovally Trap
- Outbreak Company - Moeru Shinryakusha
- Ousama no Ura Shigoto
- Ousama Game
- Oujo Alexandra
- Oujisama wa Inai
- Oujitachi wa Izonsuru
- Oujisama no Kanojo
- Oujisama no Obenkyou
- Ouji wa Tadaima Dekasegichuu
- Ouji to Yamori
- Ouji to Houkago
- Ouji Romantica
- OUI OUI DAYS
- Ou-sama no Shichiya
- Ouchi he Kaerou
- Otto Carius: Doromamire no tora
- Ottori Sousa
- Otter no.11
- Otoshite Appli Girl
- Otona no Tame no Piano Lesson
- Otona Pink
- Otona No Mondai
- Oton
- Otona no Jikan
- Otometeki Koi Kakumei Love Revo!!
- Otomeza Spica Shinjuboshi
- Otomen
- Otomegokoro no Jiyuugata
- Otomegokoro
- Otome wa Inoru - Himitsu no Dormitory
- Otome x Ranbu
- Otome wa Boku ni Koishiteru
- Otome no Honki
- Otome no Iroha!
- Otome Historic
- Otome Cake
- Otokonoko Zukan
- Otomari Honey
- Otokonoko wa Maid Fuku ga Osuki!?
- Otokomae! Beads Club
- Otoko no Musume Days
- Otoko Hime to Mahou no Lamp
- Otogibanashi no Fude
- Otogi no Machi no Rena
- Otogi Moyou Ayanishiki
- Otogi Matsuri
- Othello (HASUMI Toui)
- Othello (IKEZAWA Satomi)
- Othello
- Otenki Oniisan
- Otaku no Musume-san
- Osusume Boyfriend
- Osuteki Daarin
- Osoku Saku Hana
- Oshioki Shaman Musume
- Osoba de Misasete!
- Oshiire kara Ai o Komete
- Osaerarenai!
- Orphen
- Orochi
- Orokamono no Koi
- Origami
- Organ
- Orichalcum Reycal
- Orfina
- Oretama
- Oretachi ni Ai wa Nai
- Oretachi no Field
- Oresama Ouji
- Orefeti
- Ore wa Teppei
- Ore to Hero to Mahou Shoujo
- Ore to Atashi no Kareshi-sama
- Ore to Fuuki Iin no
- Ore no Subete ga Kimi no Mono
- Ore no Ko desu ka?
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru Ai
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru + H
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru 4-Koma
- Ore no Imouto Official Anthology Comic
- Ore no Hanashi o Shiyouka
- Ore ni Koi Shite Dousunda
- Ore ga xx de Model Debut!?
- Ore ga Doutei o Sutetara Shinu Ken ni Tsuite
- Ore ga Akuma de, Aitsu ga Yome de
- Order wa Boku de Yoroshi desu ka?
- Ordinary
- Orange Yane no Chiisana Ie
- Orange Yellow
- Orange Sweet Olive Blossoms
- Orange Planet
- Orange Delivery
- Orange Kiss
- Orange Bubble Gum
- Open Sesame (Mutou Hiromu)
- Orange
- Open Sesame
- Oouso Swing
- Ootagawa Junjou Lovers
- Oooku no Sakura - Gendai Oooku Jogakuin
- Ookamitachi no Tengoku
- Ookamitachi no Gohoubi
- Ookamitachi no Shiikuhou
- Ookamidomo no Shitsukekata
- Ookami Shounen
- Ookami no Ketsuzoku
- Ookami no Dou
- Ookami Lover
- Ookami Nante Kowakunai
- Onsen Wakusei
- Ookami Kodomo no Ame to Yuki
- Onsen de Aimashou
- Onnanoko wa Koi o Suru to Mousou Shichaun Desu
- Onnanoko wa Yoyuu!
- Onnanoko Play
- Onnanoko Tokidoki Otokonoko
- Onna no Ko Kenkyuukai
- Onna Kyoushi
- Onna no Ko ga H na Manga Egaicha Dame desu ka?
- Onkochisin na Kanojo
- Onmyou Taisenki
- Oninagi
- Oniyuri-san and Himeyuri-san
- Onikirimaru
- Onikirisama no Hakoirimusume
- Onikiri Jyuzo
- Oniisamakata, Goranshin!
- Oniichan to Issho
- Onidere
- Onigari no Mori de
- Oni-Gokko
- Oni ga Warau
- Oni ni Itaru Doro
- Ongaku no Jikan
- Oneichan to Issho
- Onegai Teacher
- Onegai Kami-sama!
- Onegai Sensei
- Oneechan ga Mamotte Ageru!
- One Piece Omake
- One Winter
- One Piece - Historic Grammar (Doujinshi)
- One Outs
- Once Again
- One Day
- Omumedai
- Onaji Sora wo Miteiru
- Omega Tribe Kingdom
- Omoide Emanon
- Omamorishimasu, Dokomademo
- Omamori Himari
- Omamori no kamisama
- Omae no Gohoushi wa Sono Teido ka?
- Omae Ga Sekai o Kowashitai Nara
- Olimpos
- Old Boy
- Okutsukimura no Yukaisou
- Okuman Chouja no Kakehiki
- Okujouhime
- Okitsune-sama de Chu
- Okubyou na Koi
- Okitsune no Hanayome
- Okane ga Nai
- Okashi na Futari (OKAUE Ai)
- Ok Girl
- Ojousama wa Oyomesama
- Ojousama wa Budoukai de Odoru
- Ojousama to Oresama to
- Ojousama to Youkai Shitsuji
- Ojousama no Inu
- Ojousama no Untenshu
- Ojousama no Himitsu
- Ojousama no Gohoubi
- Ojiichan Wa Shounen
- Ojikoi
- Oishii Kankei
- Oira Houkago Wakadaishou
- Oikaketemo Chikazuitemo
- Ohmune Maou-sama no Hon
- Ohimesama no Yurikago
- Ohisama Egao
- Ohimesama no Recipe
- Ohimesama Navigation
- Oh! my Prince
- Oh, My God!
- Ogawa to Yukaina Saitou-tachi
- Oguna - Opera Susanoh Sword of the Devil
- Offered
- Off-time no Kemono
- Odeko no Mahou
- Ode to Kirihito
- Octave
- Ochite Chika Chika
- Occult Maiden - Hishou - Oni o Tsugu Shounen
- Obrigado!
- Occult Academy
- Oboretai
- Obito no Hime to Kubinashi Kishi
- Oblation Love
- Obocchama no Otanoshimi
- Obaachan wa Idol
- O-Guts!
- Oasis Keikaku!
- Obake Life
- Oboreru Hitomi
- Oboreru Kemono no Koibito
- Oboreru Sakana
- Occupation to Beloved
- Ochiru Seija no Seppun
- Odoriba Hotel
- Odoru Keikan
- Odoru! Kremlin Kyuuden
- Odu-kun no Vita Sexualis
- Oeufs D'ange
- Off Time
- Ogawa to Yukai na Saitoutachi
- Oh! My Darling
- Oh! My Maid
- Oh! My Sweet Baby!!!
- Ohana Moyou no One-Piece
- Ohana no Oujisama
- Ohana to Chocolate
- Ohikkoshi
- Ohisama Company
- Ohisama no Hana
- Ohisama no Tamago
- Ohitorisama Monogatari
- Oikakete mo Chikazuite mo
- Oikakete mo Chikazukuite mo
- Oishii Kimi List
- Oishii Otoko
- Oishii Study
- Ojiichan wa Shounen Tantei
- Ojiizoo Quest
- Ojou-sama wa Oyome-sama
- Ojousama's Orders
- Oka no Ue no Rakuen
- Okaeri wa Kochira
- Okami to Koshinryo
- Oki ni Mesu Mama
- Okimono Kimono
- Okina to Tsuyuko
- Okinimesu Mama (AKINO Matsuri)
- Okome-chan
- Okosama Brat
- Okujou no Bai-Bai
- Okusan no Mousouteki Nichijou
- Okutsuki Mura no Yukai Sou
- Omaera Minna Damasareteiru!
- Omerta - Kochou no Yume no Kate
- Omishi Magical Theatre: Risky Safety
- Omoi no Kakera
- Omoi no Kisetsu
- Omoi no Saki
- Omoi Omoware Suri Surare
- Omoide Konpeitou
- Omokage O Motomete
- On the Quiet
- One Day, Suddenly, Like Love
- One Missed Call
- One Piece Databook
- One Piece dj - Black Sword
- One Piece dj - Black Sword:Alternative Ending
- One Piece dj - Boukyaku Countdown
- One Piece dj - Lotus Maker
- One Piece dj - Tears Will Surely Turn into Strength
- One Piece dj - Three Days of Extreme Extravagance
- One Piece dj - Una Música Dolce Tocaba
- One Piece Green
- One Piece: Red
- One Piece: Wanted!
- One Plus One
- One Pound Gospel
- One Shot
- Onedari Shoujo
- Onee-chan Dorobou
- Onee-chan to Issho
- Oneesan no Jijou
- Onegai Kamisama!
- Onegai Teacher!
- Onegai Twins!
- Oneshot (OGURA Muku)
- Oni ni Hatsujou
- Oni Yashiki
- Onii-chan Complex
- Oniichan Lab
- Oniisama E
- Oniwaka to Ushiwaka - Edge of the World
- Only One (MOEGI Yuu)
- Only the Ring Finger Knows
- Only You (FUJIOMI Karen)
- Only Your Hero!!
- Onmyouji ni Naru Houhou
- Onna no Ko Keikaku
- Onnanoko Awase
- Onnanoko no Sekkeizu
- Onnanokotte Honto ni Mou
- Onward! Maiden Road
- Oo Seyo!! Sengoku Gakuen Seitokai
- Ookami ga Kuru!
- Ookami Kakushi - Fukahi no Shou
- Ookami Nanka Kowakunai!?
- Ookami Nante Kowakunai!!
- Ookami Shounen to Hamu no Hito
- Ooku Chakapon!
- Ooma ga Toki!
- Ooparts Sex
- Ootari Gakuen Shikkoubu
- Ootomachikku Enjeru
- Operation Liberate Men
- Orange Road
- Orchid Valley Sanshimai Monogatari
- Order wa Boku de Yoroshii desu ka?
- Ordinary School
- Ore ga Akuma de, Aitsu ga Yome de.
- Ore Koi!!
- Ore ni Honey Trap
- Ore ni Kamauna!
- Ore no Hanashi wo Shiyouka
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai dj - Brocon Imouto ga Tada Hitasura Ani to Ichaicha Shitai Hon
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai dj - Chibineko
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai dj - Ore ga Imouto de Imouto ga Ore de
- Ore no Kanojo ga Stalker na Ken
- Ore no Mono ni Nareba Ii
- Ore no Mono ni Narinasai.
- Ore no Mune de Sake
- Ore no Ushiro ni Tatsu na!!
- Ore o Koeru
- Ore Ride!!
- Ore x Yome
- Ore-sama Ouji
- Orenji Kakumei
- Orera Koi ni Zenryoku
- Orera Kourin!
- Oresama Gattai Keikaku
- Oresama Kiss
- Oresama na Pet
- Oresama no Toriko
- Oresama wa Koi no Dorei
- Organ(Ryuusui Takafumi)
- Orgel Garden
- Osakana wa Ame no Naka
- Osananajimi no Hatsukoi Kyoushitsu
- Oshaberi na Jikanwari
- Oshiete Katekyo
- Oshigoto no Jikan!?
- Oshioki da yo, Shiba-kun
- Oshioki Gakuen
- Ososugita Saikai
- Osuteki Darling
- Othello (Otsu Hiyori)
- Othello (Shoujo)
- Othello Tsukamoto Youichi
- Otobako Garden
- Otodama
- Otogi Story Tenshi no Shippo
- Otogi Taisen Fantasma
- Otogi Zoshi
- Otogibanashi de Himitsu no Kiss
- Otogibanashi Wo Anata Ni: Tsukiyo No Maihime
- Otoko Irochaya
- Otoko Oidon
- Otokokemono desu!
- Otokonoko Catalog
- Otokonoko wa Hachimitsu
- Otokonoko Wa Maid Fuku Ga Osuki
- Otome -Kikan Gretel
- Otome no Omocha
- Otome no Sainou
- Otome to Meteo
- Otomeiro Stay Tune
- Otona Keikenchi
- Otona ni Natte mo
- Otona Ni Nuts
- Otona no Manaa
- Otona no Shoumei
- Otona no Yoru no Otogibanashi
- Otonage (KARIKAWA Seyu)
- Otonosama Gorangyou
- Otouto ni Koi Shitara
- Otouto wa, Ookami
- Ou Dorobou Jing
- Ou Dorobou Jing - Twilight Tales
- Ou-sama no Sougiten
- Ou-sama no Tamago - Delicious Love & Cooking
- Oubou Ookami to Akazukin
- Ouchi e Kaerou
- Ougon Honey
- Ougon no Suikenshi
- Ouji Domo To Dousei Hajimete Mimasu
- Ouji na Geboku no Aishikata
- Ouji no Hakobune
- Ouji no Hakoniwa
- Ouji no Kikan
- Ouji to Joujin
- Ouji to Ken
- Ouji-sama Sama no Jijou
- Oujisama Game
- Oujisama Lv1
- Oujisama no Ren'ai Jijyou
- Oujisama no Tsukurikata
- Oujosama to Bodyguard
- Ouka Ryou Wars
- Oukan Latte Art
- Oukoku no Kagi
- Our Alliance - A Lasting Partnership
- Our Love Manual
- Our Nishizaki Cavalry Corps
- Our Time of Dawn
- Ousama Game (Renda Hitori)
- Ousama Game (shoujo)
- Out (HIDAKA Shoko)
- Out Code
- Over the Blue
- Over the Moon
- Over Time
- Overly Sentimental
- Overman King Gainer
- Oya Niwa Naisho no Koimonogatari
- Oyaji! Arisawa-san'chi no Hanashi
- Oyaju Rider
- Oyayubi kara Romance
- Oyayubihime Infinity
- Ozu no Kakashi Tsukai
- Ore Alice - Danjo Gyakuten
- O/A
- Oeufs Dange
- Oniisama e...
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai - Kiririn@deredere (Doujinshi)
- Oshiete, Natsu.
- Ouji Hiroimashita.