[Reducing Mosaic]STARS-842 Yotsuba of Kosumi, the delinquent student that I am, is toyed with by her sweet kisses. This is a kissing love story with my tutor, Yotsuba-sensei.

A hero who was playing around without listening to his parents even though he was preparing to take university entrance exams. One day, Yotsuba, a tutor, came to such a hero. A hero who rebels against Yotsuha, who tries to teach him indifferently. In the midst of all this, she suggested that if she studied from Yotsuha, she would give him a kiss as a reward. At first, Yotsuba is a hero who makes fun of him, but when he sees Yotsuba's seriousness...