Moon and Blood Vol. 3 (manga)

It’s decision time for Kai. Stay or go. He was just getting comfortable being a houseguest at Sayaka’s house, his nemesis keeps coming back – and this time, they weren’t going to go away without a fight. They now have a new school teacher Ms. Karino – she seems awfully friendly with Kai. Do they know each other? And what is she doing here? Will Sayaka finally admit her feeling towards Kai?