Created In celebration of the 40th anniversary of the founding of Coro Coro Comics. The anime brings together many famous Coro Coro Comics characters. It takes place in an elementary school the characters attend.

In a world inhabited by demons, cyclopes, and other fantastic creatures, humans stand apart as the outcasts. Quick to anger, the human race engaged in a war that all but wiped them out. The few humans that remain are seen as a delicacy, serving no purpose but to be hunted down and eaten. One day, a golem—a wandering protector of nature—encounters a lone human child while patrolling. Inspired by her enthusiasm, he takes the girl, named Somali, under his wing. Together, the duo embarks on a journey to find Somali's parents and bring her home.

After falling asleep while playing an online game, a man wakes up and finds himself transported to that game's world as his in-game character, Arc. He wastes no time adjusting to his new environment, but soon realizes that he is using the skeleton avatar he chose when creating his character, which forces him to hide his visage to avoid unwanted attention. Arc goes to the nearby castle town of Luvierte, hoping to become an adventurer and take on quests to earn money. With his overpowered abilities, Arc embarks on a fantastical journey—exploring diverse territories, looting various monsters, and helping people get out of sticky situations. However, his seemingly innocuous actions may soon involve him in a brewing large-scale conflict that will forever alter the fate of the realm.

Rishe Irmgard Weitzner finds herself in a familiar situation: her fiancé is publicly breaking off their engagement, and her ducal family is about to disown her in shame. However, Rishe is not distraught; she has already had six chances to rebuild her life and chase a different passion each time. But she would always get swept up in a war and die, so now she wishes for her seventh reincarnation to be easygoing and uneventful. What Rishe does not take into account is the presence of Arnold Hein, the crown prince of the Galkhein Kingdom. He is destined to usurp the throne and become a tyrant who starts a large-scale invasion of neighboring countries. To make their encounter worse, Arnold is the one who killed Rishe in her previous life. That is why it is all the more shocking when he proposes to Rishe on the spot. In pursuit of her desired life, Rishe must consider accepting Arnold's proposal and discover the reasons behind his brutal actions to stop the war from ever happening.