Search of Genres for "adventure"

One Piece: The Soul Purchasing Pirate
One Planet for Everyone! Building Science and Technology Civilization at the Beginning
One Punch of Justice
One Sword to Immortality
Online Game: Evil Dragon Against The Heaven
Only I am not attacked in a world overflowing with zombies
Only I Shall Be Immortal
Only I Who Got The Initial Job As Demon King
Only Sense Online
Only Sense Online (WN)
Only Sense Online - Hakugin no Megami
Onna dakara, to Party wo Tsuihou Sareta no de Densetsu no Majo to Saikyou Tag wo Kumimashita
Ookami to Koushinryou
Ore Dake Kaereru Kurasu Teni
Ore ga Heroine wo Tasukesugite Sekai ga Little Apocalypse!
Ore ga Isekai Dungeon da! - Tensei Shitara Karada ga Dungeon to Kashiteita
Ore no Isekai Shimai ga Jichou Shinai!
Ore no Kioku ga nai Isekai no Danjon to Maho no Gakko
Ore no Ongaeshi: High Spec Murazukuri
Ore no Real to Netgame ga Love Come ni Shinshokusare Hajimete Yabai
Ore to Kawazu-san no Isekai Houriki
Ore wa LV99999, Shikashi, Ore no Tokei ga 1
Ore wa Ryouri to Kaji de Maou wo Honenuki ni Suru: Isekai kara Hajimaru Shufu Musou
Ore, Doubutsu ya Mamono to Hanaseru n desu
OreMegane
Oreta Seiken to Teikan no Kenki
Ostentatious Zhao Yao
Otaku Engineer in Great Tang Dynasty
Other World Assassin Life of a Man who was a Shut-in
Other World Travel Diary by a Relatively Peaceful High School Student
Otherwordly Kitty-Cat ~Reborn as a Cat~
Otherworldly Evil Monarch
Otherworldly White Dragon Lord
Otoko Darake no Isekai Trip ~BL wa Okotowari~
Otoko Nara Ikkokuichijou no Aruji o Mezasa Nakya, ne?
Otome Survival
Oukoku e Tsuzuku Michi
Outbreak Company
Outcast Magician And The Power Of Heretics
Overgeared
Overgod Ascension
Overlimit Skill Holder
Overlord
Overlord (WN)
Overlord in Cultivation
Overlord, Love Me Tender
Owari no Chronicle
Painting of the Nine Immortals
Panlong
Paradise of Demons and Gods