Blue (CHIBA Kozue)

From JShoujo Scans: A painful love story of four childhood friends on a island. Mimi comes back from Tokyo to visit and meet her childhood friends. Seems like they are worried about Mimi for the sudden visit. Seems like she's heartbroken when her boyfriend broke up with her. To lift her spirits her friends try to find the legendary blue cat that has a bell attached to its tail. Legend says it will grant your wish, but will this cat even help what Mimi is going through?