Sexual intercourse during the mother's pregnancy—After knowing the other is the mother, we indulge in the act of conception—Oishi Saki ROE-281

Saki, the mother, is addicted to masturbation while secretly in love with her son, Kosuke. Meanwhile, Kosuke also hides feelings forbidden by his mother, spending his time in anguish. When they can no longer confide in each other, a letter completely changes their relationship. Saki gently holds Kosuke, who is devastated after learning he was born the wrong person. The two, having suppressed their emotions until now, are bound together through intercourse, replacing the traditional mother-son bond.