Asa made, Motto.

"Let's be lovers when we are grown up,"—it was a promise between Mitsuru, the boy next door, and me. One day, Mitsuru transfers to my high school! He has a twin brother, Ryo. But then, Ryo kisses me unexpectedly...?! This story unfolds with a childhood promise made between Mitsuru and me. Now in high school, our paths cross again as Mitsuru becomes my classmate. Things take an unexpected turn when I meet his twin brother, Ryo. Suddenly, everything changes with an impulsive kiss from him...