Groups
- gohyakuen chokinbako 21
- goma hangetsu 21
- grapefruit 21
- graygreed 21
- gyokusaijima 21
- hadantorque 21
- hamurabi 14 21
- hanamaru mugen gym 21
- hanamuguri 21
- harem heat 21
- heart of cool 21
- hentai to hentai no hentai 21
- hi-cal 21
- hikarito mahou koubou 21
- hotate chanpon 21
- ikinariya 21
- imagineforme 21
- inaka no yasaiya 21
- inakagurashi 21
- inudamashi 21
- isotonix 21
- jitaku studio 21
- kagayaku hoshizuna 21
- kaguyahime 21
- kaikan algorithm 21
- kamatsukatei 21
- karamoyou 21
- karegare 21
- kijirushi ryouhin 21
- koh no atelier | mushoku no habatsu 21
- kohagura. | koguroya. 21
- kokkei-nagaya 21
- kon juuichibai 21
- kotoribidou 21
- kotorikan 21
- kss 21
- kuragakuya 21
- kuroneko-kan 21
- kyapa city 21
- littlewitch 21
- live house 21
- log house 21
- lucky club 21
- m de pink 21
- mag 21
- mainichi-ga-psy-g2 21
- makeinu 21
- mandara ryuuseigun 21
- marasca no oni 21
- master-random 21