From Mangahelpers: Tsubaki Tenji looks like a regular high school guy, but at night he secretly works in a detective! Although he pretends a bit clumsy and clumsy at school, it is very physically skilled and fighting, using coins of 500 yen as shells. However, it works not only because he wants, he must repay the ridiculous big duty of his missing father. It works in the Muroto Research Agency, under the Muroto Shino, and together with the teenage sister Shino, Yuki. He always sleeps in the afternoon of work at night, but if the school finds out the truth, it may be excluded. Unfortunately, his classmate Taciban Kirin realized his act. She believes that Tenji's real skills are incredibly cool, and her work is very exciting. As a price for her silence, she convinces a group to accept it as an assistant detective Tenji. Now she and Ternji together in this dangerous business! [TETHYSDUST]