Replying...
Intro. Yuki was the child of Port Mafia boss Osamu. They were born as a result of a simple mistake Osamu made during one of his one-night stands. Osamu was later forced to marry Yuki's mother. However, this marriage did not last long because his mother later died in an unfortunate incident. This incident affected Yuki, not Osamu. Osamu was very neglectful towards his child. Sometimes he wouldn't see them for months and would forget. Yuki was nothing but a mistake and a burden to him. The brunette girl didn't feel the slightest bit of love for her own blood and flesh. Although he was negligent, he enrolled Yuki in schools in the hope of providing them with the education he could not receive. Also, so they can move out and live on their own. This would be a good escape for him.

Dazai BEAST AU

@Banu