One day, Mob(Atsuhiro Inukai), a college student, realizes that he lives in the world of a BL manga, where the handsome men are approaching him harshly and the ''BL love flags'' are rising every minute. As a straight guy who likes girls, Mob struggles and fights against the hot attackers desperately. (The original manga has become a hot topic on Twitter and pixiv.)

To protect himself, Mob reads lots of BL manga comic books and studies every possible case and its solutions. How to resist and escape… Greeting for every situation, Manners of drinking parties, Behavior at sauna, Boy friend of his younger brother and a destined Valentine’s day…

No matter how hard he tries to resist, Mob is about to be dragged into this deep BL world. He is terribly fatigued and almost falls down the stairs on his way home. At that time, someone saved him. Mob just remembers his warm and soften back and a faint scent of citrus. After sniffing out all the handsome men on campus, he finally finds the man he was looking for! That guy is…