OakNotice Me, Lily!
OakElementaler
 Oak AzzraelItsuka, Kasanariau Ashita e
 OasisOnsoku Hishou Sonic Mercede...
 ObaaMinami no Shima ni Furu Yuki
 ObaachanP.W. Project Witch
 Obaa-sanMashou Megane
 Obaasan
 ObabaHarem Mura ~Dousotsu Fukahi...
 ObabaTanetsuke Mura ~Hakudakugam...
 Obaba-samaWajin Ibunroku ~Asaki, Yume...
 Obara AnzuHare Nochi Kitto Nanohana B...
 Obara KarinHare Nochi Kitto Nanohana B...
 Obara NanaoUchi no Ichizu na Tsuma ni ...
 Obara NorioMaou no Ingu
 Obara Shin'ichiUchi no Ichizu na Tsuma ni ...
 Obara ToukoSixty Nine
 Oba-san
 Obase MiyukiShikkan ~Hazukashimerareta ...
 Obata ChiakiOmoide no Kaeru Basho
 Obata MakotoShiritsu Onsen Gakuen 3-jik...
 Obata NatsumiRen'ai Multiple!
 Obata TomomiTomomi Senpai Gomennasai.
 Obata YuuHakui no Gohoushi
 Obayashi KeitaTsuisou no Augment, Tsuisou no Augment
 Oba YukariKoshitsu Byoushitsu, Nurse no Obenkyou Ouyou Hen...
 OberNamaiki Dark Elf 3 Shimai g...
 OberarztWeinsgranat
Oberreit
 ObieMorningdew Farms
 Obihiro RaichiBitch Gakuen ga Seijun na H...
 OboroTenma Shoujo Rena -Hatsujou...
 OboroTenka Touitsu Koi no Ran
 OboroFuyu no Otogibanashi
 OboroMitama ~Shinobi~
 OboroTaimanin Asagi, Taimanin Asagi Gaiden ~Chao..., Taimanin Asagi 2, Lilith-Izm02 ~Nakadashi/Har...
 OboroDemonion ~Maou no Chika You...
 OboroUtawarerumono: Futari no Ha...
OboroTrue Treasure
 OboroUtawarerumono
 OboroInmyouji
 Oborogasaki ArareJunjou Karen Freaks!
 Oboro IoriUnmei Senjou no Phi
 Oboro / Oboro ToukoAku no Onna Kanbu "Kono Wat...
 Oborosawa YukarikoOborokomachi
 Oborotsukiyo no KimiGenji Koi Emaki
 Oboro YachiyoToki no Kizuna Sekigahara K..., Toki no Kizuna Hanayuitsuzuri
 Oboshiro DaiyaHimawari no Kyoukai to Naga...
 Oboshiro DenbeeHimawari no Kyoukai to Naga...
 Oboshiro Hipopo Daiya