Having reached the pinnacle of human potential, Varvatos was so powerful that the rest of humankind began calling him the Demon Lord, both fearing and respecting his overwhelming influence. As a result, he felt alienated from his fellow humans, leading him to desire true companionship—an equal he could call a friend. Hoping his fate will change in his next life, Varvatos decides to start anew and reincarnates three thousand years later as Ard Meteor, the son of a seemingly ordinary couple in a rural town. Unfortunately, he realizes that even after weakening himself, his strength still overshadows everyone in this era. Moreover, his lack of social skills bars him from achieving his goal of making friends. But worst of all, the repercussions of suddenly abandoning his former position have begun to bite him back in some of the most unimaginable ways possible.

After her battle against the mysterious organization Amarariruku, Teru Momijiyama returns to her regular life in Tokyo—all while secretly continuing to save people as Japan's hero Shy. As a result of her experiences with others, Teru is able to slowly gain confidence in herself. While she still has a long way to go, Teru continues to make progress towards learning what being a hero truly means. While walking around the city after school, Teru runs into Ai Tennouji, whom she quickly befriends and begins to open up toward. Teru quickly learns more about her new friend’s past—she has run away from her village in search of something directly related to Teru's work as Shy. While the threat of Amarariruku continues to loom over her,Teru must decide how closely she is willing to work with the mysterious Ai.