It's been about 4 years since I made my debut! Yura Kano, who has grown up to be an adult, challenges her role as a married woman for the first time! Her husband's boss (Oki), who has been aiming for Yura to retire and work free after her in-house marriage, devises her strategy and sends her husband to a local business trip. Let Yura who is alone sleep with sleeping pills. She secretly makes a master key for her home and keeps committing Yura who can not escape again and again. Yura who was sober and innocent is trained by a big tree who hates her and gradually transforms into a sex-loving bitch while feeling her guilt.