Dad's Wedding (2016)

28-year-old Sasano Seiko (Sonim) has returned home to celebrate her widower father's (Itao Itsuji) remarriage. However, the marrige-partner-to-be is the double-divorcee-with-children close friend of Seiko's older brother. Her father says he will be the "mother" to everyone. Will Seiko be able to accept her father's marriage?