Until when? I unlocked Kosugi route if that's what you're asking.
EDIT: I looked around and found out that there was a Kosugi after... man I feel so dumb now, but thanks for the lead.
Dammit, I can't seem to unlock future with tachibana route, what the hell I'm supposed to do? I've already done all the routes at least 3 times to make sure I didn't miss anything, what else do I need to do? Do I need to unlock all the skits too?