Osananajimi no Watashi wa Mob de Itai no ni, Nazeka Heroine no Renai Taishou ni Natte Iru.

Osananajimi no Watashi wa Mob de Itai no ni, Nazeka Heroine no Renai Taishou ni Natte Iru. summary: When I awoke, I realized that I had become Amatsuki Suzuna, one of the heroines of a dating game. And right in front me of was the listless and spoiled protagonist... who honestly, I disliked. Although I don't have any experience in love, I'd be a bit annoyed if I was conquered by him. Oh, that's right, if I can just continue breaking all the romance flags that come my way, then I can get downgraded to a minor character. Then, I'll let the other girls date him and... um, Miss Heroine? Aren't you a bit too close? Our bodies are touching and I can even hear you breathing. Um... I'm not a romance target, okay?