Akko-chan is a bright and energetic 5th grader in elementary school whose father is a newscaster and mother is a picture-book writer. Akko always cherishes the palm-sized mirror that was given to her by her father and treats it with care. However, the mirror was accidentally broken by her absent-minded mother. On a night where a beautiful full-moon hangs in the sky, Akko-chan buries the mirror pieces in the garden and goes to sleep. She is awakened by a soft and kind voice which belongs to the Queen of the Mirror Kingdom. She sends her gratitiude to Akko-chan for cherishing the mirror with care and offers her a magical compact mirror. Whenever she sings the magical words, Akko-chan will be able to transform into anything she wants. (Source: ANN)

A young boy uses his scientific skills to fight enemies.

After Jinta and Suzune ran away from their home as children, they were taken in by Motoharu—the virtuous sentinel of Kadono Village—and his daughter, Shirayuki. The settlement was ruled by its shrine maiden, Itsukihime, whom only a select few were allowed to interact with. When Itsukihime passed away, Shirayuki was appointed in her place. Wishing to stay in contact with her, Jinta worked diligently for years and was finally selected as the next sentinel. As the protector of the village, Jinta's duty is to eliminate any threats. One day, he encounters a demon in a nearby forest. At the end of the battle, the demon makes a proclamation about the destined ruler of all demonkind. He attaches his severed arm to Jinta, turning him into an unaging demon man. By the time Jinta comes to, Kadono is on fire. Suzune has transformed into the demon from the divination, and due to a series of misunderstandings, she murders Shirayuki and flees. Devastated, Jinta cannot forgive Suzune for her actions; he departs on a journey to find her. As Jinta travels around Japan across the eras, he endeavors to protect as many people as possible from aggressive demons. In his quiet moments, he contemplates what he should do when he once again faces his childhood friend.

Hinata did it. He got reincarnated into another world, took up the mantle of Hero, and slew the dreaded Demon Lord alongside his party of fellow adventurers. As his reward, he's returned to Earth to resume a normal life. Or it would be if it wasn't for the fact that his dark elf companion Mariabelle decided to travel to Earth to come and live with him! Now she uses her arcane talents to ward off any potential romantic rivals and capture Hinata's affection.