La mère de Akasegawa Naoya; est récemment remariée, et ce dernier doit essayer de bien s'entendre avec sa nouvelle demi-soeur, Amane, lycéenne dans la prestigieuse école pour filles Kasugano. Mais cette nouvelle vie de famille ne va pas se passer comme il le voulait...
Kei Sonofuji is trying to get a new start by changing her image before getting into high school. But just as it seems everything is going to go well, she gets sick and has to miss the first week. Just as she thinks she's missed out on everything, she gets a surprise from one of her classmates!