Manabu, who has become a man, begins to worry about his mother-in-law, Kaoru. She is 178 cm tall and has big F-cup breasts... Her charm as a woman that the girls in her class don't have, and her gentle way of treating Gaku, which is her son, draws her in even more towards Gaku, who is not related to her by blood. . One day, Kaoru comes home from her mom's volleyball practice and takes a shower as usual. do