Like Life

Like Life's story revolves around Kousaka Kazuma who had to move into his aunt's house due to his parents always being too busy. He lives next door to his childhood friend Miyasato Yumi, and the two of them walk together to Shitasouno Academy which they both attend. One day at school, many strange transfer students arrive at school: all over town, objects start turning into girls, though they still retain some form of what they used to be on their person. Kazuma's mobile phone is no exception and turns into a girl he names Kousaka Himeko.

[Edited from Wikipedia]