There She Is!!(2003)

Tteotda Keunyeo!!

The plot revolves around Doki, a female rabbit, meeting, falling in love with, and chasing Nabi, a male cat, in a world where love between the two species is socially unacceptable. The theme of the short is that all love can be accepted and has a chance. Nabi attempts to cure Doki's infatuation for him, but after seeing the extent of her love, he gives in and finds something he can appreciate in her.

(Source: Wikipedia)