Training a DQN boyfriend's meat toilet that blows away his reason. He can only watch his cute little sister being trained by his DQN boyfriend with his fingers in his mouth...

Fitch's first younger sister NTR drama is born! It's funny to hear my younger sister Mikako, my older brother, but she's a very successful little sister, and she's also a good friend of her brothers, and recently she's started working part-time to buy a birthday present for me. However, he met an older DQN named Takuro at his part-time job, and he lost to the forced Takuro and began dating him. Takuro goes to his home without his permission and does whatever he wants to Mikako. Mikako, who can't say he doesn't like Takuro, is in a state of being a meat toilet and my rationality is on the verge of collapse...