To the Season of Change.Momo and Kuri go out on their first date together, where Momo attempts to impress Kuri by drinking coffee to look grown-up but fails horribly. As Momo's birthday arrives, Kuri bakes him a cheesecake, knowing from her research that that is his favourite dessert, but drops it accidentally while trying to give it to him. This makes her guilty as she knows that Momo's parents are too busy with work to celebrate his birthday, so as his girlfriend she feels incredibly shameful. At the end of the day, she tries to give Momo the cheesecake anyway, but Momo holds her hand instead for the first time and says that her hand is his best birthday present, much to Kuri's pleasure and his embarrassment. Kuri then decides to not give him the cake, and they walk home peacefully together, unknown of a stalker behind them. Kuri hears about how Momo's grades are not very good, and that if he doesn't do well in his final exams two weeks of his summer vacation will be taken up by remedial classes. Not wanting her summer vacation with Momo to be ruined, she organises a study session at his house with him, along with Norika and Momo's two friends Shōta Shizuku and Rihito Sawaguchi. Momo and Kuri get closer as she reveals that she had baked cheesecake and offers him the special one with the heart on it. Momo also gets jealous when he sees how Kuri is getting along so well with Shōta, which is pointed out by Norika. As the two girls go out grocery shopping for dinner, the stalker makes an appearance at the supermarket.