My Youth Romantic Comedy Is Wrong as I Expected Novel Volume 4 is written by Wataru Watari with illustrations by Ponkan 8.

It's summer break, and Hachiman is continuing his leisurely life of solitude-until Miss Hiratsuka forces the Service Club back together to volunteer at a campground. For some reason, Hayama, Miura, and their crew of normies are there, too... Thus begins a compulsory, youthful season of fireworks, tests of courage, nighttime conversations, and bathhouse incidents, with no escape for Hachiman. Summer is indeed a minefield for the loner...