結婚前提に彼氏の直哉と同棲している那美。ある日、直哉の父親が東京観光ついでに息子に会いに来ることになる。そして、滞在中の一週間を那美の家で過ごすことに。真面目で堅物な父親を前に那美は緊張を隠せなかった。親交を深めようと一緒にお酒を飲む那美と父親。酒を飲みすぎてパンツを見せながら寝てしまう那美。パンツを見て興奮する父親。我慢出来ず媚薬を使い那美を種付けプレスする。最初は嫌がる那美だがいつしか父親の固い肉棒のとりこになってしまう。
Nami is living with her boyfriend Naoya, with the intention of getting married. One day, Naoya's father comes to visit his son while sightseeing in Tokyo. He decides to spend a week at Nami's house. Nami is nervous in front of the serious and strict father. To get to know him better, Nami and the father drink alcohol together. Nami drinks too much and falls asleep, showing her underwear. The father becomes aroused by the sight of her underwear. Unable to control himself, he uses an aphrodisiac and impregnates Nami. At first, Nami resists, but before long she becomes captivated by the father's hard penis.

– JavGG.net