Saki, 36, has remarried with a much older man and has a new son. Her son, Yuuki, is a bit of a mama's boy, probably because he grew up in a single-parent household for a long time. He brings his girlfriend home on the way home from school. Bringing tea to his room, Saki peeks through a gap and witnesses him failing his first sexual encounter. Afterwards, Saki comforts her dejected son... "Don't tell your father," says the mother as she gently teaches her son how to practice sex. Saki's maternal love is stronger than that of blood ties!!