Go! Saitama

'''Go! Saitama''' is a One-Punch Man Animated Short Film that was conceived and directed by series' Manga Illustrator, Yusuke Murata. The Short is 107-seconds long and was animated by Murata himself along with his team at Village Studio. Go! Saitama was posted to Yusuke Murata's twitter account September 23, 2021. In his post, Murata expressed his desire to further develop his skills and to add voices, music and sound effects to future animation efforts. He added that he would like to make not only One-Punch Man animations, but also animations for various other works.

Summary
'''Go! Saitama''' begins with the titular hero effortlessly defeating a monster, only for the blowing wind to carry a Grocery Store Catalogue towards his bald head. Upon reading it, Saitama discovers the existence of a 1-yen (about US$0.01) sale for high-grade hot-pot meat — but there's a catch, said sale will come to an end at exactly 5:00 p.m. that day. Never one to waste an opportunity when it comes to a bargain deal, the caped hero sets out for his destination.

Saitama sprints with tremendous speed, leaving a great trail of dust in his wake, but nearly collides a building as he checks his wristwatch to confirm what time it is — learning that he only has a few minutes left until the sale ends. Desperate, the hero rushes through a river and leaps over the city to make his way in time, but is forced to slow down in order to help an old lady cross the street. When it looks like the complications are over, Saitama is met with his greatest obstacle yet: Two trains closing in as cross the rails in opposite directions.

Believing that he is fast enough to rush past the speeding trains, Saitama puts his mind on the task and accelerates in a dashing blur, but is unfortunately unable to make it in time, crashing against the second train. Thankfully, the hero is able to narrowly avoid colliding with any of the terrified passengers inside and makes his way out the other end on the train, immediately resuming his journey for the hot-pot sale.

However, all of Saitama's efforts would seemingly be in vain, as when he finally arrives on the Grocery Store he is confronted with a long, winding line reaching across the block. Curious and confused, the hero steps inside the store to see what the commotion is about, only to discover that the line is for an autograph booth with S-Class Hero Puri-Puri Prisoner — and, more importantly, that the 1-yen hot-pot meat bargain sale has just expired.

Distraught and defeated, Saitama collapses onto the floor in frustration, but is met his trusted apprentice Genos, who reveals that he had already come to the Grocery Store and bought the hot-pot ahead of him. Smiling, Saitama and Genos set out for their home, grocery bag in tow.

Trivia

 * Go! Saitama includes a reference to ONE's popular webcomic, Mob Psycho 100, as two students who resemble Reigen Arataka and Katsuya Serizawa can be briefly seen throwing rocks at the river when Saitama rushes past them.