Search of Genres for "romance"

Onegai Twins
Ongaku no Shinigami
Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne
Onii-chan saimin
Online Game: Evil Dragon Against The Heaven
Online Game: Willingly Captured
Only I Shall Be Immortal
Only I Who Got The Initial Job As Demon King
Only Starlight
Only Wing
Only with Your Heart
Onna Kishi-san, Jusco Ikouyo
Onrain (Online – The Novel)
Ookami Kodomo no Ame to Yuki
Ookami to Koushinryou
Open a Clinic to Cultivate Myself
Open Sea
Ordered to Marry Thrice, The Mysterious Wangfei
Ordinary I and Extraordinary Them
Ore Dake Kaereru Kurasu Teni
Ore ga Heroine wo Tasukesugite Sekai ga Little Apocalypse!
Ore ga Ojou-sama Gakkou ni "Shomin Sample" Toshite Rachirareta Ken
Ore ga Suki nano wa Imouto dakedo Imouto ja Nai
Ore no Imouto ga Konna ni Kawaii Wake ga Nai
Ore no Isekai Shimai ga Jichou Shinai!
Ore no Kanojo to Osananajimi ga Shuraba Sugiru
Ore no Kioku ga nai Isekai no Danjon to Maho no Gakko
Ore no Nounai Sentakushi ga, Gakuen Rabukome o Zenryoku de Jama Shite Iru
Ore no Ongaeshi: High Spec Murazukuri
Ore no Real to Netgame ga Love Come ni Shinshokusare Hajimete Yabai
Ore to Kanojo ga Geboku de Dorei de Shuujuu Keiyaku
Ore to Kanojo no Koi wo Chounouryoku ga Jamashiteru
Ore to Kanojo no Moeyo Pen
Ore to Kawazu-san no Isekai Houriki
Ore wa Ryouri to Kaji de Maou wo Honenuki ni Suru: Isekai kara Hajimaru Shufu Musou
Ore wo Suki Nano wa Omae Dake ka yo
Ore, Doubutsu ya Mamono to Hanaseru n desu
Ore, Twintails ni Narimasu.
Originally, I Was A Delinquent, But Now I'm A Serious Girl!
Osananajimi Ga Zettai Ni Makenai Love Comedy
Oshikake Inumimi Dorei ga, Neeto na Daieiyuu no Oseiwa wo suru you desu
Ossan (36) Ga Idol Ni Naru Hanashi
Ostentatious Zhao Yao
Other World Assassin Life of a Man who was a Shut-in
Otherworldly Evil Monarch
Otoko Nara Ikkokuichijou no Aruji o Mezasa Nakya, ne?
Otome Game no Akuyaku Reijou o Tanoshimitai!
Otome Game no Burikko Akuyaku Onna wa Mahou Otaku ni Natta
Otome Game Rokkushuume, Automode ga Kiremashita
Otome Gēmu no Akuyaku Demonai Reijō wa Fianse o Hitasura Aisuru