On Seiran Island, secret society NLNS is united by Junnosuke Tachibana, who is determined to crush a law. They have found a benefactor, an unknown rich man, who offers them a secret base and cash. Their mission is to locate a mysterious girl and stop the law, keeping the SHO off their trail.

Tomohiro Izumi, an introvert, is randomly selected as student council president, but rumors circulate, leading to an unprecedented battle with former president Shio.