Cat hybrid Yi-Jun has long harbored a crush on his senior from the same department, Kwon Na-Ra. Simply watching him from afar was enough to make Yi-Jun’s days at school feel happy and full. But when Na-Ra suddenly starts getting close to him, Yi-Jun can’t help but feel confused by the sudden change. Every time they’re together, Yi-Jun’s heart flutters uncontrollably, and just as their relationship seems to be moving forward—right at the moment they’re about to kiss—Na-Ra suddenly transforms into… a fat rat?! *“What the hell is this rodent?! Where’s my sunbae?!” “W-wait, Yijoon! I can explain!” “I hate lying rats the most!”* Can cat hybrid Yi-Jun and rat hybrid Na-Ra overcome their species gap—and the chaos that comes with it?