Kako begins living together with Yui in order to protect her. At first, all the two girls do is fight, but with the help of a little advice from Kota, they gradually start to grow closer. At Yui's birthday party, organized by the whole gang, Kako is happy to see that Yui looks like she's having a little fun... But just as she's starting to enjoy the quiet life, Yui's criminal father makes contact with her?! The Yui vs. Kako saga reaches its fateful, tearjerking conclusion!