Because of My Stupidity, I Became a Timid Vampire

【Eight Signs Bronze Award work, you won’t lose out buying it, you won’t be fooled】 He accidentally summoned a demon and made the wish “give me a girl who belongs only to me,” even demanding a system to conquer her. But the way this wish was fulfilled had a small problem——he became her. Afterwards, she met a girl and somehow got bound to the system with this girl, so she had no choice but to be forced by the system to reverse-conquer herself through the girl. This is a light-hearted daily yuri story between a timid tsundere bottom and a cool, doting, black-bellied top, 100% pure sugar, no poison, no knives.