Taizou has been livin gin the same house with yuusaku for a long time since his taizou's parent died. along that time, they were very close together at first, but as the time went by, the gradually distance themselves from one other because they start to feeling something when they are together. but when yuusaku almost being rape by his senpai, taizoou came along to save him and after that, still under a drug's effect, yuusaku confess and so did taizou and they embraced each other.
Gaten Na Aitsu