"I've been cheating on you. Oh, and it's not just one guy. It's three. Sorry about that." Back in middle school, Akiyoshi Sunao's first-ever girlfriend shattered his heart, and he swore off love. However, all that changes when he develops a crush on a girl in his university's film club. Just as he's finally beginning to move on from the past, he bumps into his ex-girlfriend. Little does he know that this is only the beginning... To his horror, he wakes up in her body the next morning!

"Te he estado engañando. Ah, y no es sólo un chico. Son tres. Lo siento". En la preparatoria, la primera novia de Akiyoshi Sunao le destrozó el corazón y renunció al amor. Sin embargo, todo eso cambia cuando se enamora de una chica en el club de cine de su universidad. Justo cuando finalmente comienza a dejar atrás el pasado, se topa con su exnovia. Lo que no sabe es que esto es sólo el comienzo... ¡Para su horror, se despierta en su cuerpo a la mañana siguiente!