DRPT-107 Miyu Hirose, Kana Yura

Shortly before her older sister leaves home to get married, an overly attached younger sister discovers her sister's most sensitive weakness and starts teasing her in secret. What begins as a mischievous attempt to keep her close escalates through private moments at home, during bridal-beauty preparations, and around the fiance, until the older sister finally turns the tables in a charged payback scene.