Obviously It's Just Gaming, Please Don't Involve Me in the Relationship Between Yandere Senpai and Tsundere Girlfriend

First, I picked up a white-haired yandere who's the No. 1 Player in the world. Then, a blonde girlfriend who's the ace of a professional team fell into my lap. I'm just helping my sister with the game, so why am I being dragged onto this battlefield of love?!