The wife-approved threesome just won’t stop! Emi (the wife’s big-breasted friend) delivers insanely slutty sex, followed by passionate make-up sex with a jealous Sae. What was supposed to be a one-time dream-like day turns into something more permanent. At Sae’s own suggestion, Emi moves into the apartment right next door. Yuuto’s libido can no longer be satisfied by his wife alone, so Sae proposes they start a full-time threesome lifestyle. The couple’s everyday life transforms into one of constant pleasure, drowning in the massive breasts and mind-melting ecstasy of both women.