То је период Таишо у Јапану. Танђиро, добродушни дечак који продаје угаљ да би преживео, проналази своју породицу коју је заклао демон. Да ствар буде гора, његова млађа сестра Незуко, једина преживела, и сама је претворена у демона. Иако уништен овом мрачном стварношћу, Танђиро одлучује да постане „убица демона“ како би своју сестру поново претворио у човека и убио демона који је масакрирао његову породицу.

Shunsuke Aoba has just transferred to a new school and can’t wait to attend. Excitedly, he sprints to the school but, upon arrival, finds that no one is there. Unfortunately, Shunsuke didn’t know that his first day was a holiday, of all things. However, it seems that he is not the only one on campus. As he is about to eat his lunch, he meets a student named Natsumi. Shunsuke gives her some of his food, and the two strike up a conversation. Natsumi was born as a so-called SL girl, a particularly tall girl. She herself accepts her specialness but is rejected by many of her classmates. How will Shunsuke react to this? Will their initial friendship continue?

37-year-old corporate worker Mikami Satoru is stabbed by a random killer, and is reborn to an alternate world. But he turns out to be reborn a slime! Thrown into this new world with the name Rimuru Tempest, he begins his quest to create a world that’s welcoming to all races. Broken free from ordinary, stale past life, his fresh adventure in a fantasy world as a slime monster with unique abilities begins.

A superhero-admiring boy without any powers enrolls in a prestigious hero academy and learns what it really means to be a hero.