Since childhood, Hiroki has suffered from a malady that leaves him weak and tired. Ayano, his neighbor and childhood friend, has always taken care of him as best she can. Even with her care and attention, he can't help but fall into a depression that he will never get better, since it seems most days all he can manage to do is get to school and back home again. Then one day there is a knock at his door. When he answers, a pretty young girl wearing a nurse's outfit gently says, "Hi, I'm Maria. I am your private nurse." Meanwhile, the new school nurse, Mio, also takes on the task of curing Hiroki. Ayano must overcome her jealousy that these two women have intruded on her relationship with Hiroki while at the same time hoping that he can be cured. Mio wants to cure him to prove she can be a b