You're Mine ♥ (KotoUmi Fanfic)

Two girls, by the name of Kotori Minami and Umi Sonoda, have been best friends since they first met many many years ago. Now second years at Otonokizaka High School along with their best friend Honoka Kousaka, they form school idol group μ's! Along with six other girls, their adventure as school idols brings about so...