Recently, My Sister Is Unusual

Mitsuki and Yuya become stepsiblings after their parents marry, but Mitsuki struggles to adjust to her new family, and Yuya is unsure how to connect with her. One day, Mitsuki becomes possessed by the spirit of Hiyori, who has feelings for Yuya and believes he can help her move on to the afterlife. To facilitate this, Hiyori places a leather chastity belt on Mitsuki, setting in motion a plan aimed at helping Hiyori reach heaven.