The Minazuki Family's Fiancée: On My 16th Birthday, the Head of the Main Family Came to Pick Me upMinazuki-ke no Iinazuke ~Juurokusai no Tanjoubi, Honke no Toushuu ga Mukae ni Kimashita~; 水無月家の許嫁～十六歳の誕生日、本家の当主が迎えに来ました。～

Rokka Mizunashi, a young girl, has lost her father, the only family she had left, to a strange illness, leaving her all alone in the world. Rokka has lost her reason for living, and a young man claiming to be the head of the Mizunashi family appears before her and tells her a shocking truth: "I am a 'forgiven bride' to you. Rokka had never known anything about her father until this day. About her father. The family code. The fact that the Mizunazuki family is the "descendant of a celestial maiden" as represented in the legend of the robe of feathers.