| Oomuro Family Manga |  | A spin-off of the Yuru Yuri series featuring Sakurako and her sisters. |
| Ousama Game (RENDA Hitori) Manga |  | A high school class, containing 32 students, all receive a strange text message on their cell phones one night. It welcomes them to the "Ousama Game," in which they are given specific tasks to carry out in a 24 hour period.
No one takes it very seriously at first, as the tasks are trivial... |
| Oresama Ouji Manga |  | Sawa hates Judo. She was once really good at it, but boys always rejected her because she was so strong. Now she’s entering high school and the gorgeous captain of the Judo club has selected Sawa (against her will) to be the club manager! He also claims he knows her from the past... How will Sawa... |
| Onikiri-sama wa Hakoiri Musume Manga |  | A boy opens a chest at his father’s temple, and inside pops out a Hanyou, a half demon, half human girl who wishes for nothing more than to avenge the death of her mother, and herself by her father. It just so happens to be that the boy looks just like his ancestor, the one who killed the girl... |
| Omoni Naitemasu Manga |  | Konno Izumi, a beautiful life drawing model tormented with the unrelenting curse of her excessive beauty. |
| Oh! My Prince Manga |  | Siffle Brown is an exchange student who suddenly appeared in front of Hina. He seems very arrogant and forceful, but he's also very handsome and (probably) kind. And he turns out to be a real prince?! |
| Oniwakamaru the Visitor Manga |  | 28 years earlier, there was a plane crash in the mountains of Gifu Prefecture. The barrier that the Kobo Daishi, Kukai had created to seal away the demons was destroyed in crimson flames... Present day, Oniwakamaru, King of the Yokai, appears inside the body of pure and innocent Tachibana Hitori!! ... |
| Ozmafia!! Manga |  | When she suddenly wakes up, the heroine, Fuka, who was in a completely unknown land, has no memory of anything.
All of a sudden, an unknown silver-haired man suddenly points his sword at her as the whole town runs about in confusion trying to escape.
I’m going to be killed — at the moment she... |
| Outbreak Company - Moeru Shinryakusha Manga |  | Having a light novel author father and an eroge illustrator mother, Kanou Shinichi is a thoroughbred otaku. However he does not have any special power except for his broad knowledge, sharp insight, and impeccable instinct about "moe" and its products, from manga to anime to games to light novel... |
| Okujou Hime Manga |  | Mayu and Nobu have been best friends ever since they where kids, always the best buddies. Along with them is the other childhood friend, introverted Yuiko who always has been some sort of damsel who the boys have always helped. Upon entering high school the trio meet the daughter of the... |
| Ore to Kawazu-san no Isekai Hourouki Manga |  | Tarou was just an ordinary university student until a strange old magician summoned him to another world. Upon learning that his newly acquired magical power is 8 million (8 million more powerful than an average magician), he uses his abnormally powerful magic to revive the old man that caused all... |
| OZ (TOKIYA Seigo) Manga |  | In a not too distant future, the world is confronted with a host of issues: pollution, resource depletion, population expansion, and so on. In response, the Japanese government developed sensory simulation capsules (“bedsâ€) and successfully launched a virtual reality program —... |
| Otome Historic Manga |  | Toko is a third year high school student who's been active in the ping pong club. One day, the teacher she likes, Katakura-sensei, quit being the ping pong club advisor and went to head the history club. Going to check out the people who 'stole' her precious teacher, Toko finds herself applying... |
| Oniichan no Koto ga Suki Sugite Nyan Nyan Shitai Burakon Imouto dakedo Sunao ni Narenai no Manga |  | Saya is an average schoolgirl in every way but one; she's got a HUGE crush on her older brother. She's never been able to raise any flags with him (mostly due to her habit of beating him to a pulp whenever she sees him), but one day, she wakes up in the body of a cat that he brought home! Could... |
| One Piece - Digital Colored Manga |  | As a child, Monkey D. Luffy dreamed of becoming the King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber...at the cost of never being able to swim again! Now Luffy, with the help of a motley collection of nakama, is setting off in search of the "One... |
