Tonari no Oniisan
From Shinmakoku Scanlations: People say that the first love is difficult to forget ... And this is so at least for the chiroto. No matter how much he wanted, he simply cannot throw away the Vataru from his head and heart. This guy has a neighborhood, which is five years older than him, now even there is a lover, and he is clearly not interested in it. Charoto must learn to live with it ... and with Vataru as a neighbor on the room forget, will definitely be the most difficult thing.