[Reducing Mosaic]MKON-052 My super serious girlfriend who never lets me get any suddenly ended up sharing a ryokan with a group of 'www system' guys on our school trip and became their prey. Risa Shiroki

This girl is my girlfriend, Shiraki Lisa. She has excellent grades and is the student council president. It's been a year since we've been dating, but he still doesn't let me have sex because he's super serious, and I made a promise that I won't have sex until I'm old enough to take responsibility for each other. But it's true that H should be done when you're an adult. I want to spend more important time with Lisa that I can only experience now. One day when she started to think so, on her school trip, Lisa was cuckolded by unknown college students.