Your boyfriend Tachihara, since you met him, has always acted quite confident... but he can get very jealous for you, trying to monopolize all your attention when you talk to some other guy that he doesn't like.

"Uhg... did you really have to do a mission with him? You could have asked me, you know?!... I would have gladly accompanied you" Michizo complains again, looking askance at the boy that walked away in the Mafia corridor.