START-599 “I’ll be done in an hour…” Using karaoke as a substitute for love hotels, weekly secret trysts. Summoning the younger teacher who is her son’s homeroom instructor to sing without singing and release sexual desires. A carnivorous mother riding

Hikari befriends her only son’s younger teacher at a social gathering, and they often talk alone together under the guise of counseling.Eventually, they started meeting secretly at a karaoke shop and developed a physical relationship.At first, the man was rational, but he could no longer tolerate Hikari’s tolerance and aggressive approach and became absorbed in extramarital sex.