Who Says Cats And Dogs Can't Be Together | NCT Renjun ff

A story about cats and dogs school where cats keep with cats and dogs keep with dogs, they are like enemies. With the role they made themselves, cats and dogs aren't allowed to be in a relationship. Eventually, a dog boy, Renjun falls in love with a cat girl, Rui who also has a secret crush on him. They feel so akward that they can't even look at each others eyes.
Renjun, who is really good at art, is always drawing sketches of her in his notebooks, while Rui, who's good at writing, stays all day in the house after school and write songs and poems about him, refusing to go out of her room and not letting anyone in.