Kumiko Ijima who is one of Nube's students recognizes that a man in a local park is really a criminal wanted for murder when she remembers drawing his face from the wanted photos posted by the police. Kumiko warns her classmate Kyoko while at the same time the man discovers the drawing with the name initials "K.I." written on Kumiko's drawing portfolio and briefly sees that Kumiko wears a red ribbon in her hair. The cops chase the criminal who crashes his car into a seal where a demon takes control over his soul. The demon is now on a killing rampage to find any girl that wears a red ribbon whose name initials are "K.I.". (Source: ANN)

In the Legends of Jewel Land, the Jewelpets were born from the love and caring of their queen, Jewelina. However a strange meteor crashes into the Mirror Ball, destroying it into a million pieces and its fragments called "Deco Stones" were all scattered in Jewel Land. In the present time, Ruby, a dimwitted Rabbit Jewelpet and owner of the Kira Kira Shop, has a thing on sparkly decorations and loves to collect anything that sparkles and shines. However, when she and the others learn about the legend of the Mirror Ball and the Deco Stones, they all decided to go and search for them, until they all meet 5 strange individuals called the KiraDeco 5. The group also has the same goal on wanting to collect the Deco Stones and they befriended the Jewelpets, especially to one of their members: Pink Oomiya. Now, the group need to gather all the Deco Stones and stop the Eternal Darkness from taking over the human world.

16-year old Keisuke Saji loves to fantasize about young beautiful women. He hopes to land the object of his affection, Koizumi Akira. However, Koizumi hates Saji (as well as all men) to the point of assault. While most guys take Koizumi's cold shoulder as a hint, Saji pursues head-on without having rejection faze him.

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. 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. 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.