Inu mo Hashitte Koi wo suru

Atsushi is a graduate student who moves in with his boyfriend Yoritomo to work on his thesis. Yoritomo, who enjoys playful and suggestive thoughts, starts thinking of ways to take advantage of their cohabitation. However, complications arise when Yoritomo's brother Katsuyori suddenly shows up. Meanwhile, Atsushi's friend is also trying to seduce Katsuyori in a separate storyline.