Oni Gyaru-Kun No Hara No Naka summary:

Kamishiro Ritsu, a highschool student with a height complex, is working hard to rebuild his father’s rundown kendo dojo. Then all of a sudden one day a long-haired boy in a bizarre outfit appears in front of Ritsu and says “I’m an oni! I’ve come to retrieve the Mallet of Fortune from you, the descendant of Issun-Boushi!” Y2K Gyaru Oni x Straight-Laced Boy in this 2021 version of the “Issun-Boushi’ fairy tale!