Kouichi always thought of Mao as his little sister, but when she returns after living in France for several years, she's definitely not his little sister anymore! Which makes the fact that Koichi's mom has invited Mao to stay at their house while she attends the same high school a path that will be fraught with peril. Especially since Kouichi's been trying to build a relationship with Yuumi, and the revelation that the cute new house guest is a non-related girl may become a full blown disaster by the time his best friend Kazuki, her sister Nana, her best friend Narumi, Asuka, Eriko, Mitsuki, Megumi, Eiji and all the other kids at school get overly involved. Little girls grow up in the most unexpected ways as young love, teenage angst and a little higher education all collide in KIMIKISS PURE ROUGE - THE COMPLETE COLLECTION!