A certain day, it has been intruded by Ayano Kobayakawa it wants you to tell study moreover who is pupil during one’s absence of sister-in-law. Of the thing to tell that a sister-in-law is away, if it is good in me, keisuke offers a temporary tutor. Then suddenly, please massage my breast! Ayano who exposes its chest. Apparently to pupils in the school. (Because younger brother massages every day the style good) it seems to make it public. It is thrown into the power of Ayano who holds the complex in the chest, protagonist received the virgin! In close friends of Ayano of the rival, the relation with Ayano finds out to the sister-in-law and hurly-burly. Really is the desire to the bust improvement of cute pupils accomplished?!?