Asahina Yuki's biological father passed away before she was born. After her birth, Miwa kept her daughter by her side until one month before her remarriage, and asked Asahina Hikaru to take her sister back to Asahina's house.
Except for her second brother Ukyo and fourth brother Hikari, Yuki has never met any of her other brothers, and the other brothers are also kept from knowing that she has a sister. She also has a sweetheart named Aoki Yuuto.
Shiraishi Touka did not die that year but lost her memory. She is now a student of Yuuto's mother and studies medicine with her teacher. Touka knows Yuki, and Yuki returns to Asahina's house to try to marry her brother Qiori.
Purpose: Everyone is happy
Poor Yue Liu meets a group of lunatics.
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