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"B-Class" (B級, Bī-Kyū, Tonari: 36) is the 29th chapter of the One-Punch Man manga series.


A care package is dropped by Saitama's home. Inside the care package is a bunch of letters from various people. Almost all of the letters for Genos are positive, while the majority for Saitama are negative. Genos starts to feel very angry for the lack of appreciation that Saitama is given for the countless lives that he has saved. Although Saitama simply shrugs the hatred off, Genos feels deep regret for showing Saitama the letters. However, Saitama eventually receives a thank you letter. Saitama is called in by the Hero Association to congratulate him on becoming rank one in C-Class. Saitama brought into an interview to ask him whether he wants to remain in C-Class or move up to B-Class.

Saitama decides to move up to B-Class and is given a psychoanalysis test. Overhead of the interview, there are several Hero Association staff observing and discussing Saitama. They discuss whether or not he is a sham. After a short discussion, Sweet Mask is seen as an adviser on whether or not Saitama should move up. Sweet Mask replies that they do not need him for such a trivial task as promoting someone to B-Class. Sweet Mask additionally states that he only wants a say in promoting people to Class A and higher as they tend to have a strong influence on the association's image. After the interview, Saitama goes to a nearby food stand to eat. There he finds Mumen Rider and it is revealed that it was he who wrote the thank you letter to Saitama. The two share a smile and order mozuku.

Characters in Order of Appearance[]

Chapter Notes[]

Online Cover


Volume 1 12345678Extra
Volume 2
Volume 3 1617181920ExtraSpecial
Volume 4
Volume 5 2526272829Extra
Volume 6
Volume 7 353637Extra 1Extra 2Extra 3
Volume 8
Volume 9 41424344454647Extra
Volume 10
Volume 11 565758596061Extra 1Extra 2
Volume 12
Volume 13 68697071ExtraSpecial
Volume 14
Volume 15 7677787980Extra 1Extra 2
Volume 16
Volume 17 858687Extra
Volume 18
Volume 19 91929394Extra
Volume 20
Volume 21 979899100101Extra
Volume 22
Volume 23 107108109110111112Extra
Sea Monster Arc
Manga Chapters 23242526272829
Manga Volumes
Webcomic Chapters 24 • 25 • 26 • 27 • 28 • 29 • 30 • 31
Fights Stinger vs. SeafolkLightning Max vs. Deep Sea KingPuri-Puri Prisoner vs. Deep Sea KingSpeed-o'-Sound Sonic vs. Deep Sea KingSneck, All Back-Man, Jet Nice Guy and Bunbun Man vs. Deep Sea KingGenos vs. Deep Sea KingMumen Rider vs. Deep Sea KingSaitama vs. Deep Sea King