Onee-chan wa Koi-Yokai

Onee-chan wa Koi-Yokai is a slightly risqué romantic comedy centered around the unlikely relationship between a young boy and an alluring supernatural older sister figure. When Yuuki Kuwahara enters high school, he makes the decision to live on his own at his paternal grandparents' old house. His choice to move out is driven by more than just a desire for independence; he harbors a deep-seated hope of reuniting with someone special he encountered during his childhood. However, upon arriving at the property, Yuuki discovers that his plans for a quiet, solitary life are immediately upended. The house, which was supposed to be completely abandoned and empty, holds a surprising secret. Instead of an empty home, he is greeted by an unexpected resident who turns his world upside down. This mysterious encounter sets the stage for a charming and playful romance between a human boy and a captivating yokai, blending everyday life with supernatural affection in ways Yuuki never could have anticipated.