Currently Indulging In Love

Fukami Tadashi-san's twin brother, Katsura (who's nothing like his brother), has already investigated his brother's date and he has decided she is inappropriate for him. They break it off, but Tadashi is depressed so Katsura finds her again and begs her to get back together with his brother. What's going to happen? Source: MU Extra chapter from Sekai wa Bokura no Tameni! volume 1.