Kokoro is a tutor who is not only beautiful and kind but also extremely dedicated to her profession, and she is adored and respected by all her students. This is quite reasonable given her character, as she is very lenient and indulgent towards her students. It is also this reason that causes the moral gap between teacher and student to be almost negligible, but in terms of emotions, it is immense. The story unfolds when she agrees to tutor a mischievous, stubborn high school student from a wealthy family. Being at the age of puberty, he is very curious about sex and is further tempted by his tutor's very seductive attire, not wearing a bra while tutoring, which leads him to frequently experience urges and desires to 'have' her at all costs. Of course, with creativity and the persistent will not to give up, this is not a difficult challenge for this young boy.