Keiko is a woman who has dedicated her life as a masochist under her master, Yodo Chikushi (pseudonym). Since childhood, she deepened her sexual dependency through repeated self-bondage and masturbation, and her life changed drastically when she met Chikushi by chance during college and came under his training. Even after graduating, she continues to work full-time in caregiving while living 24/7 in a livestock shed, undergoing relentless training to serve her master sexually. On days when her master does not visit the shed, she follows assigned programs to mold herself into a female beast—performing vaginal contraction exercises, oral servicing lip training, filming self-degrading masturbation sessions, crafting homemade outfits, and writing fantasy novels and illustrations—all devoted to serving her master. This video features numerous intense and captivating sex scenes from Keiko's daily life, including anal teasing, blowjob and anal servicing in an SM hotel, spanking-fueled piston sex, and candle wax torture.