OVA bundled with the 10th volume of the One Punch Man manga. It features an original story by the series' mangaka, ONE, about the secret story of the birth of Saitama's hero suit.
StudioMADHOUSE
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A story about Saitama from when he still had hair and his only costume was a track suit. Several shops in Saitama's neighbourhood have gone out of business and the owner of the last one left needs his help.
Voice cast
Saitama
Genos
Gofukuya
Chinpira B
Ooya
Chinpira A
Kingyo Yami
Same universe
One-Punch Man
tv
manga
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