Seinen Manga

Drama , Comedy , Seinen Status: Completed Osen Chapter 2

Comedy , Drama , Gender bender , Seinen , Slice of life Status: Ongoing Oshi Ga Budoukan Ittekuretara Shinu Chapter 37

Comedy , Romance , School life , Seinen , Shoujo ai Status: Ongoing Oshi V Ga Oshiego De Watashi Ga Mama De!? Chapter 27

Comedy , Fantasy , Seinen Status: Completed Oshiete! Kirara Fantasia Chapter 27

Historical , Mature , Seinen Status: Ongoing Oshigerinanshi - Rouchou Tanten No Yotogibanashi Chapter 8

Comedy , Historical , Romance , Seinen Status: Ongoing Oshitone Tenzen Chapter 1

Drama , One shot , Seinen , Slice of life Status: Completed Osmotic Pressure Chapter 0

Comedy , Seinen Status: Ongoing Ossan, Tensei Shite Tensai Yakusha Ni Naru Chapter 4

Action , School Life , Comedy , Martial Arts , Seinen Status: Completed Osu!! Karate Bu Chapter 241

Action , Comedy , Martial arts , School life , Seinen Status: Ongoing Osu!! Karatebu Chapter 246

Action , Adventure , Comedy , Horror , Seinen ,... Status: Ongoing Oswald The Overman In The Lesser Planes Of Hell Chapter 6

Comedy , Drama , Medical , Seinen Status: Ongoing Otanko Nurse Chapter 31.2

Action , School Life , Supernatural , Seinen , Horror Status: Completed Otogi Matsuri Chapter 73

Ecchi , Romance , Supernatural , Comedy , Seinen Status: Completed Otogi no Machi no Rena Chapter 60

Action , Fantasy , Drama , Comedy , Seinen Status: Completed Otogi Taisen Fantasma Chapter 10

Ecchi , Romance , School Life , Supernatural , Comedy ,... Status: Completed Otoko O Misete Yo Kurata-kun! Chapter 7

Comedy , Mature , Romance , School life , Seinen ,... Status: Ongoing Otoko Wo Misete Yo Kurata-Kun! Chapter 7

Action , Martial arts , School life , Seinen Status: Ongoing Otokojuku Gaiden - Daigouin Jaki Chapter 28

Action , Shounen , Martial Arts , Seinen Status: Completed Otokojuku Gaiden - Date Omito Chapter 42

Comedy , School life , Seinen Status: Ongoing Otokojuku Side Story: Crimson!! Women's Private School Chapter 12

Action , Romance , School Life , Comedy , Seinen Status: Completed Otomari Honey Chapter 35

Action , Historical , Mature , Seinen Status: Ongoing Otome Chikku Sensou Chapter 2

Ecchi , School Life , Comedy , Seinen Status: Completed Otome Historic Chapter 11

Comedy , Romance , Seinen , Shoujo , Supernatural Status: Ongoing Otome Monster Caramelize Chapter 25

Ecchi , School Life , Slice of Life , Seinen , Shoujo Ai Status: Completed Otome no Teikoku Chapter 296.3

Fantasy , Romance , Supernatural , Comedy , Seinen ,... Status: Completed Otome Youkai Zakuro Chapter 77

Comedy , Drama , Psychological , Romance , School life ,... Status: Ongoing Otona Ni Narenai Bokura Wa Chapter 16

Seinen Status: Completed Otonaninattara-Bijinninarukochan Chapter 1

Comedy , Romance , Seinen , Slice of life Status: Ongoing Otonari-San Game Chapter 28

Drama , Comedy , Slice of Life , Seinen Status: Completed Otouto no Otto Chapter 21

Romance , Drama , Comedy , Slice of Life , Seinen ,... Status: Ongoing Otoyomegatari Chapter 111

Drama , Josei , Mature , Psychological , Romance ,... Status: Ongoing Otto No Chinpo Ga Hairanai Chapter 7

Action , Seinen Status: Ongoing Ottoman Chapter 30

Romance , Comedy , Mystery , Seinen Status: Completed Ottori Sousa Chapter 1.5

Action , Fantasy , Adventure , Seinen Status: Completed Ou Dorobou Jing - Twilight Tales Chapter 7

Seinen , Horror Status: Completed Ou-sama Game - Kigen Chapter 30

Action , Comedy , Drama , Historical , Seinen ,... Status: Ongoing Oudou Rakudo No Vigilante Chapter 2

Seinen , Historical Status: Completed Ouja no Yuugi Chapter 27

Drama , Fantasy , Historical , Seinen Status: Ongoing Oukoku Monogatari Chapter 10

Drama , Seinen , Shounen ai , Slice of life Status: Ongoing Our Colors Chapter 1

Action , Adventure , Comedy , Cooking , Doujinshi ,... Status: Ongoing Our Relationship Is... Chapter 69

Action , Drama , Mystery , Seinen Status: Completed Ouroboros Chapter 133.5