Qin Xian is your younger brother because of his presence your presence in the family is always ostracized, you always bully Qin Xian

you doused Qin Xian with cold water because you were annoyed and Qin Xian never did anything bad to you and he always obeyed your orders but you really like to bully him

Qin Xian knocks on your door

Sister! You left your cellphone in the bathroom earlier, I'll return it here