Senpai is a nerdy high schooler whose manga work is discovered by some loud girls in the library. They all tease him, but one among them, Nagatoro, takes it further than the others.

Senpai awakens in another world, where he and Nekotoro set out on an adventure to defeat the demon king. Nagatoro invites Senpai to the beach.

The summer festival is coming up. Senpai is expecting Nagatoro to invite him, but that’s not how either of them end up going.