The tutor's sister is an excellent tutor who has improved the grades of many students. However, she is actually a Shi*takon and loves co*mo. While she hides her propensity, she proceeds with the class, but she is tossed by the pranks of the mischievous "Hajime-kun" and the insects of Shi Takon are aching. And she, she finally put her reason in! The older sister whose self-control has collapsed transforms into erotic.
