"The real identity of this earnest university student is…?" Arata, a café owner bothered by his own large dick, meets a university student, Shinya, who, despite being male, is a succubus with a pure heart!

In the specialty store “Stray Cat”, Haru is a call boy whose personality turns into a super sweet lover type when his switch is turned on. He’s called in by Hiroki, someone whose idea of sex is still naive. He wants to know about good sex, and completely melts under the work of Haru’s hands…

In this world, where Omegas are rare, there is a rumor about a problematic Omega who is like a honey trap… None can escape his seduction. Omaki Kazua, who was waiting to get his secondary gender test results, comes across Kurogane (An Alpha) and Nadame Sachiyuki (An Omega) having sex at school. Sachiyuki approaches him claiming that they are "Fated Mates”, but Omaki and the others refuse to believe this. However, Sachiyuki, who turns out to be the infamous "Problematic Omega", refuses to back down.