Natsume, who lives with her husband and brother-in-law, secretly harbors feelings for her brother-in-law. Natsume, whose sexual desires had been building up, one day asks for a kiss from her drunk brother-in-law and has sex without using a condom, even allowing him to ejaculate inside her… She awakens to pleasures she can't experience with her husband and repeatedly engages in intense, dense internal ejaculation sex… From that day on, an odd double life of internal ejaculation begins…
