"If you can cum 100 times in three days, I'll let you go" - this is the unreasonable rule that a young wife is held captive by.
Her sensitivity is boosted with aphrodisiacs, she is made to squirt over and over again with toys, and she is subjected to physical training with repeated creampies. Her rationality is destroyed by teasing and edging, and she eventually becomes a woman begging for pleasure. The orgasms that are just for the sake of counting eventually turn into true pleasure. When she reaches the hundredth orgasm, the woman begins to shake her hips of her own accord, throwing aside love and memories as she seeks out the 'Yakuza dick'! Gangbang, forced creampies, and pleasure-induced depression - it's all packed into this hell of confinement and orgasms.