[Machine Translation] Kosuke, a high school student who is indifferent to everything, is confronted by a onee high school teacher named "Sonee". Moreover, he (or she?) is the older brother of a childhood friend whom Kosuke used to adore. He (or she?) is the older brother of a childhood friend that Kosuke used to adore. Kosuke is confused, but she asks him, "Will you let me be your youth? Kosuke is confused, but he is not.......