Based on the manga of the same name, A World That Definitely Becomes BL VS A Man Who Definitely Doesn't Want to Be in BL is about exactly what it says on the tin. A meta commentary on Boys' Love works, wherein every character is somehow gay and gorgeous, Mob exists as a character who is always in the background and has no intention of getting in on the action. Even someone who may not be 100% familiar with the tropes that are highlighted in this short run series is bound to enjoy the comedy of watching Mob carefully rearrange his life so that he can avoid being alone with cute boys, or helping cute boys up from the sidewalk drunk, or helping someone to fall in love with him. In his attempts to avoid all of the BL tropes Mob forgets that he is, in fact, a BL trope.