I was reincarnated into an otome game, but my ally's rival character is a genuine lesbian.

The protagonist reincarnated in an otome game is just a mob elementary school student. But at this rate, won't they die again in a traffic accident? No way! So the protagonist proposes cooperation to a rival character girl within the otome game. However, she's a genuine full-fledged lesbian... and the protagonist's chastity is in danger.