[20 years of crazy, selfish, unrequited love for my relative's daughter!] Mai, a relative who hasn't seen her for a long time due to illness, goes to her uncle's house to help out. Meanwhile, her uncle, who remembered Mai's words from when she was little, "I'm going to marry you!", is Kokoro when the topic of marriage finally comes up. However, when he finds out that Mai is married to a complete stranger, Kokoro for revenge explodes! He administers an aphrodisiac that was lying dormant in the house and immerses his penis in the pleasure of sex. Bodily fluids flowing NTR!