The new transfer student who arrived at school, Ichika-chan. Rumor has it she's an easy girl who allows creampie, known for doing bareback and freebies without hesitation. Her intense reputation has earned her the nickname "Ultra-Invincible Nymphomaniac." I, a shy guy, couldn't help but approach her when bullies forced me to invite her to my place. The rumors were all true. I got creampied and squirted on until I was completely drained. Drawn by her charm, every playboy in school starts pursuing her one after another. So what kind of ending awaits the ultra-invincible nymphomaniac, Ichika-chan?