Sakura Ichika (serious, somewhat stubborn) and Sakura Futaba (friendly, youthful) are twin sisters who get along so well that their family and friends become astonished at times.
No matter where they go or what they do, the two have always been together from a young age. Even after their surroundings change around them while growing up, their relationship still remains the same. There’s never a day where Ichika (stable) isn’t around Futaba (pampered), be it at home, school, or anywhere.
But one day, their mother started to worry about them since they’ve been hanging around each other excessively. She warns them about the difference of getting along and relying on one another, and that no matter how close they are as sisters, it is not possible to stay together forever. After that, their relationship gradually begins to change bit by bit.
On the other side of Ichika’s feelings of “wanting to see Futaba’s smiling face” are her worries of her personal desires considered unforgivable and “not normal.” On the other side of Futaba’s feelings of “wanting to always be together with Ichika” is her presence of mind lost in their diverging relationship.
Their bond that harbors hidden emotions beyond that of sisters… What form will it take? And what kind of conclusions will come out of it all――？