Inu-Neko

A high school student finds himself infatuated with his teacher, drawn to her physical attractiveness. Complicating matters is the fact that his sister harbors romantic feelings for him, creating an ongoing emotional entanglement. Just as these relationship issues begin to escalate, an unexpected supernatural event occurs: the souls of his beloved teacher and his sister are swapped between their bodies. Faced with this bizarre twist of fate, he must now confront a difficult question regarding where his true affections lie.