​The second year of high school has only just started, and Amane is already in a bind. His new class includes everyone's angel, Mahiru, as well as their friends Itsuki and Chitose. Of course, no one can know how close he and Mahiru have gotten so long as they pretend to be strangers. This arrangement may not last long, though, given that a certain someone is clearly unhappy she can't spend time with Amane. While he tries to figure out what to do next, some old wounds resurface...