Every other day, Sunao Akiyoshi finds himself swapping bodies with his ex-girlfriend, Lemon Nishikawa. As if that wasn't weird enough, Sunao has a crush on his senior in film club, Natsumi Kogahara...who just so happens to be Lemon's roommate and bestie. When Natsumi goes to a movie with "Lemon," not knowing that it's actually Sunao in her body, she finds herself strangely attracted to her friend! The romcom chaos is only growing stronger!