During her husband's three-day business trip, Taiichika agreed to host a private art lesson at her home. The students initially seemed eager and well-behaved, but upon learning her husband would be away, they exposed her secrets and began executing a sinister plan. Featured in the popular hardcore series, Kamiha Taiichika is kidnapped and confined for three days, transforming completely into a depraved sex beast. No longer an ordinary schoolteacher, she evolves into a creature driven by insatiable, twisted desires—brought to climax repeatedly until reality itself fades away.