The protagonist lives with his childhood friend, Miyuki Kotoriyu, a girl who is a boy.
One day, while living a sexually active life, he meets Charles, a video streamer whom Miyuki met through SNS.
The girl who was at the meeting place was not a fair-skinned, beautiful half-girl, but a man’s daughter.
Miyuki and the main character want to become friends with Charles, who smiles happily and says that he wants to start with sex if …… you like, and Miyuki smiles wryly, saying that she wants what she wants.
The main character is anxious, but also expectant, as the two smile at him and say, “Of course I want Ni ni ni to help me.
The naughty daily life with the two daughters begins.
