Groups
- mange 15
- manjudou 15
- marshmallow kyoudan 15
- masahiko private academy 15
- mastermind 15
- maxi age 15
- meishou misettei 15
- mekujira 15
- mellow 15
- mercator zuhou 15
- meromelo 15
- metalzigzag 15
- mikan batake 15
- mike ni mage 15
- milk cha 15
- milk sausage 15
- mini 15
- minomushitei 15
- mithril 15
- mizore nabe 15
- mizu no iro 15
- mmm 15
- modae shine 15
- mokko rich vanilla 15
- momochichi 15
- momoiro phantasmagoria 15
- morihama no shindansho 15
- mousou aria 15
- mukuton kyouju to soratobu potato. 15
- nahapuro 15
- nanashi shounen 15
- nanaya 15
- nano trans 15
- nathaniel teikoku 15
- necocoya 15
- neko happyaku 15
- neko rop 15
- nekomasshigura 15
- nekosupi 15
- nekotoraya 15
- nemunoya 15
- nihatsu shika ataranai 15
- niji seichou 15
- nikujirushi 15
- nines graphics 15
- notorious 15
- nukoya 15
- number sharp 15
- nupuryu no sato 15
- nymphet 15