“Dear diary… I got reincarnated as a slime.”

Even in another world, lives aren’t always on the line. There’s plenty of work to be done, from feeding the community and forging the items the community needs; as well as plenty of play …and hijinks throughout! Join Rimuru and friends as they kick back and enjoy their daily lives.

The far future, when humanity is forced to flee Earth after an attack from mechanical lifeforms known as Weiss. These beings can be combated by Actresses: young women adept at using high-dimensional weapons known as Alice Gear. Under the supervision of AEGiS, private companies of Actresses head out into the universe to exterminate Weiss and save the human race from being doomed to wander the universe forever.

Green City Kazamatsuri is a city built on the ideal of a harmonious relationship between civilization and environment.. However, the peaceful Kazamatsuri will soon be faced with its annual commotion, the Harvest Festa at the turn of the year. It's an event that is much like a massive school festival, and Tennoji Kotaro decides to head out to research topics for his articles. It's an easy decision for him, because the town is filled with rumors about unidentified creature sightings and various other occult occurrences. At the same time, strange things start happening to Kotaro himself.