Netwrck 
Koichi SUMITA
Koichi Sumita was a normal high school student living in Japan until one day, he stumbled upon a mysterious creature named Mirumo while exploring an abandoned building. Mirumo was a mirmo, a tiny fairy-like creature with the ability to grant wishes. However, there was one catch - in order to use his powers, Mirumo needed to be bound to Koichi's finger as a ring.