Second-year high school student Yatora Yaguchi is a delinquent with excellent grades, but is unmotivated to find his true calling in life. Yatora spends his days working hard to maintain his academic standing while hanging out with his equally unambitious friends. However, beneath his carefree demeanor, Yatora does not enjoy either activity and wishes he could find something more fulfilling. While mulling over his predicament, Yatora finds himself staring at a vibrant landscape of Shibuya. Unable to express how he feels about the unusually breathtaking sight, he picks up a paintbrush, hoping his thoughts will be conveyed on canvas. After receiving praise for his work, the joy he feels sends him on a journey to enter the extremely competitive Tokyo University of the Arts—a school that only accepts one in every two hundred applicants. Facing talented peers, a lack of understanding of the fine arts, and struggles to obtain his parents’ approval, Yatora is confronted by much adversity. In the hopes of securing one of the five prestigious spots in his program of choice, Yatora must show that his inexperience does not define him.

As demonic forces run rampant and heretical paths prevail, countless lives are plunged into misery. In this era of chaos, a mysterious stone descends upon the world, transforming into the enlightened Stone Monkey, burdened with the mission to save all living beings. Bound by the cycle of cause and effect, he must once again face his ancient foe. Will he defy fate and rewrite his destiny, or fall into darkness? This is the origin of Sun Wukong's rise as a legendary great demon.The soul of the ape is about to awaken.

A summary of season one of Tensei shitara Slime Datta Ken with some extra content leading into season two.

Ifrit, who has been trapped in Rimuru due to the latter's Predator skill, recaps events of the season while in a discussion with Veldora as they play Shogi.