| Overflowing Hidden Desires | Web Novel | chinese | 4.4 |
| Overflowing with Love! Born to My Younger Mama, I Became a Vtuber Little Brother! I’m a Billionaire Because the Mama Who Rescued Me Unleashed My Hidden Talent! “Come Home? You Abandoned Me!” | Web Novel | japanese | 2.6 |
| Overgeared | Web Novel | korean | 3.8 |
| Overgod Ascension | Web Novel | chinese | 3.6 |
| Overkill Princess | Light Novel | japanese | 3.9 |
| Overlimit Skill Holder | Web Novel | japanese | 3.8 |
| Overlooking Your Eyes | Web Novel | korean | 3.5 |
| Overlord (LN) | Light Novel | japanese | 4.5 |
| Overlord (WN) | Web Novel | japanese | 3.6 |
| Overlord in Cultivation | Web Novel | chinese | 3.6 |
| Overlord in the Corner | Web Novel | korean | 3.9 |
| Overlord, Love Me Tender | Web Novel | chinese | 3.7 |
| Overnight Riches! My Factory Spans Past and Present | Web Novel | chinese | 3.8 |
| Overpowered Archmage Doesn’t Hide His Talent | Web Novel | korean | 3.3 |
| Overpowered Broadcast System | Web Novel | chinese | 3.4 |
| Overpowered Extra Noble in a Novel | Web Novel | korean | 3.1 |
| Overpowered Female Hacker in a Game | Web Novel | korean | 3.6 |
| Overpowering my OP Wife in Bed | Light Novel | japanese | 3.2 |
| Overriding the Heaven | Web Novel | chinese | 2.9 |
| Overturn the Entertainment Circle | Web Novel | chinese | 4.0 |
| Overturning the Male God Daily | Web Novel | chinese | 4.0 |
| Overturning the World | Web Novel | chinese | 3.9 |
| Overwrite | Light Novel | japanese | 3.6 |
| Owari no Chronicle | Light Novel | japanese | 4.1 |
| Owari no Seraph – Ichinose Guren, 16-sai no Catastrophe | Light Novel | japanese | 4.1 |
| Owaru Isekai no Arukikata | Web Novel | japanese | 3.9 |
| Owner of Twilight Intuition | Web Novel | korean | 3.3 |
| Oya ga Saikon. Koibito ga Ore wo, “Onii-chan” to Yobu yo ni Natta | Light Novel | japanese | 3.9 |
| Oya? Konyakusha no Yousu ga… | Web Novel | japanese | 3.7 |
| Oyaji Kanojo | Web Novel | japanese | 3.3 |