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?

Sayaka is in for quite a surprise. Sitting at the family breakfast table one morning is a handsome stranger, a boy named Kai. And he has come to stay, at least, temporarily. Though she's never met him before, the aloof and ill-humored boy is supposed to be a friend of her father's. Having him at home is one thing, but to have Kai show up at her school too, well, it's turning out to be more than what Sayaka can handle. With her interests piqued,