Enjoy watching the truly romance story in the naughty hentai sex Master Piece part 1. The young guy Tsubakihara Yuuji is the average student who lives together with twin sisters due to some reason. He is the childhood friend with these naughty sisters. The older twin Yuna is physically intimate only to him, her sweet childhood friend. She is extremely shy and everyone at school calls her A flower beyond reach or something like that. The younger twin Nina is a prodigy in sports. She is kind, outgoing, has lots of friends, and is smart as well. When his parents passed away, he was taken in by the Tsubakihara family where the twin sisters are. And that’s how his life with them under the same roof begun until today. His hentai sex relationship with them is fine as far as he knows. He can not choose either one of them and he will not. he rather likes this kind of relationship they have now. One day, by occasion he figured out that Yuna loves somebody. He is not from the same school and he is not a family. He is her first love, who she has cherished a lot up until now. This is what she said when her classmate tried to date her. Yuuji starts to think, Why that news touched my heart so much? Brooding about that he knocks at her door. She is ready to give him some clue. First, he is a boy. Second, they meet face to face every day. And the last hentai sex hint, that person is called Enomoto-kun. But she and he have the same surname now.