One Punch Man
Saitama has a rather peculiar hobby, being a superhero, but despite his heroic deeds and superhuman abilities, a shadow looms over his life. He's become much too powerful, to the point that every opponent ends up defeated with a single punch.
The lack of challenge has driven him into a state of apathy, as he watches his life pass by having lost all enthusiasm, at least until he's unwillingly thrust in the role of being a mentor to the young and revenge-driven Genos.
Episode 1 - The Strongest Man
Episode 2 - The Lone Cyborg
Episode 3 - The Obsessive Scientist
Episode 4 - The Modern Ninja
Episode 5 - The Ultimate Master
Episode 6 - The Terrifying City
Episode 7 - The Ultimate Disciple
Episode 8 - The Deep Sea King
Episode 9 - Unyielding Justice
Episode 10 - Unparalleled Peril
Episode 11 - The Dominator of the Universe
Episode 12 - The Strongest Hero