Sena is a second-year student in Shimano Gakuen and also is the head of the School's Student Council, who is recommended by the former head. She is the official Idol of Shimano Gakuen whose popularity is comparable to that of Riko's. Sena has a liking for penguins and is obsessed with getting as many of those toys as possible. She is able to collect Gift from every male student in Shimano Gakuen who confesses his feelings to her, but she doesn't go out with any of those guys even once. In addition, this Gift to her is easily obtainable, but it doesn't make her happy even if she has that ability.

Amaumi Haruhiko is a high school student who attends Shimano Academy in a town called Narasakicho. Narasakicho contains an unknown rainbow which constantly overlooks the town and is related to granting a magical wish called "Gift". Gift is a once-in-a-lifetime present between two people. <br><br>
As a child, Haruhiko has been close with his childhood friend, Kirino, until he obtains a new non-blood sister by the name of Riko. Haruhiko develops a strong relationship with Riko until they sadly depart due to the fact Haruhiko's father could no longer support the two of them. <br><br>
After some times passes by, Riko finally returns to the town of Narasakicho, and along with Kirino, starts to attend Shimano Academy with Haruhiko. The series revolves around the relationship among these main protagonists and slowly reveals the story behind both Gift and the rainbow.

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Sena Asakawa