The official website for the One-Punch Man anime began streaming the first half minute from the project's third original video anime (OVA) episode on Tuesday.
The third OVA, "Kojiresugiru Ninja" (The Overly Complicated Ninja), features a completely original story written by the manga's original author ONE. The OVA takes place days after Saitama dealt Sonic a defeat, as well as an ignominious punch in the crotch. Sonic still suffers nightmares as a result, in which he mutters Saitama's name over and over again.
The OVA will be included on the television anime's third Blu-ray Disc/DVD volume on February 24.
The manga's television anime adaptation by Madhouse and director Shingo Natsume (Space Dandy, Fullmetal Alchemist: The Sacred Star of Milos) premiered in Japan on TV Tokyo and Niconico Live in October, and it just ended in December. Viz Media and Daisuki both streamed the series outside of Japan, as it aired in Japan.
Thanks to Dennis R for the embedded video
Update: Typo fixed. Thanks, Mitrospeed