Unconscious beauty with G-cup!! Appears in the popular series!! Mother's friend

Kazuya can't contain her joy when she hears that her mother's friend Umi, who taught me how to study, is returning home for the first time in a while. Umi meets again and is even more beautiful than before... Kazuya's secret feelings for her, which remains the same, grow even more, and with so much momentum he ends up having a relationship with her. Kazuya, who can no longer restrains, continues to be swayed by his carnal desires and seeks each other enthusiastically. But she says that such an extraordinary relationship is unlikely to last.