Shojo no Shimobe-kun♪

It's summer! It's the sea! It's a summer camp!
Your virgin childhood friend puts the moves on you in her sexy swimsuit. Your upperclassmen are dangerously horny virgins to be around. They pretend they have experience, even though they're virgins, and try to abuse your body! The new school love comedy begins here!

The protagonist is invited along to the school student council's summer camp. There, he gets caught up in Nanao's plan for the girls to lose their virginities this summer! The protagonist ends up as their minion. Will he be able to counter attack!?

(Source: dlsite)