``I want to accomplish all that I can.'' Yahiro is the second son of a large hospital and spends his days with abandon. The only thing that matters to Yahiro is his childhood friend Rui. Although he feels shy due to his status as an adopted child, he has taught him that it is okay to be kind to him. The two of them spend their childhood together and eventually begin to get close to each other. Their relationship had been maintained in an ambiguous balance, but when his mother-in-law became pregnant, Suzuki suddenly announced that it was over!?