Makoto hasn't told Kotonoha yet of his relationship with Sekai. However, one night Kotonoha bumps into Sekai outside of Makoto's apartment and an altercation goes down. And with that, begins the the school festival...
OH MY F--KING GOD Dude let s-x get in the way of his happiness, he really does suck, I'm thinking that he shoulda caught the b--ch slap so many episodes ago.