One-Punch Man - Season 1 - Eps 12: The Strongest Hero
The inconceivably powerful Lord Boros has traveled untold distances in search of someone who can cure his boredom: Saitama! With the fate of humanity in the balance, will the two champions at last find in each other the worthy opponent they’ve been searching for?
About One-Punch Man

Title: One-Punch Man
First Air Date: 2015-10-05
Last Air Date: 2019-07-03
Status: Returning Series
Rating: 8.397/10 (from 3812 votes)
Language: JA
Seasons: 4
Total Episodes: 36
Network: TV Tokyo YouTube TV Aichi TVQ TV Osaka TVh TSC
Genres: Animation, Comedy, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Madhouse, J.C.STAFF, Bandai Visual, ADK, jeki, Shueisha, Lantis, Banpresto, Good Smile Company, TV Tokyo
Synopsis
Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he's become so strong that he's practically invincible. In fact, he's too strong — even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?