ゆうれい小僧がやってきた！

When 108 mischievous yokai escape from a sealed forest known as the "Demon's Hideout," chaos erupts, and strange incidents begin plaguing the quiet town surrounding Sai no Kawara Middle School. Enter the fearless twin brothers, Momotaro and Kintaro Osorezan, nicknamed the "Ghost Boys," who transfer to the school with a mission: to hunt down and defeat the escaped yokai. With their unique ability to combine into the powerful yokai warrior Asaa Doji, the brothers tackle supernatural foes, unravel mysteries, and protect their new friends. (Unreviewed summary by Grok 2)