Yuki was upset when she found out that her boyfriend had introduced her to another man, M-type masochist, instead of someone she could have sex with. Reluctantly, she started teasing him at her boyfriend's request. As they engaged in sexual activities, she began riding the M-type masochist while being filmed by her boyfriend. Eventually, she ended up getting fucked hard by the M-type masochist right in front of her boyfriend, making it a publicly acknowledged NTR experience.

彼氏とエッチできると思っていたのに、彼氏の友達という男を紹介され不機嫌になるユキ。M男だというその男を責めてあげて、と彼氏に言われるがまま責め始める。行為をするうちに、彼氏の撮影するカメラの前で挿入し腰を振りはじめる。最終的には彼氏の見ている前でM男にイカされまくる彼氏公認のNTR。