Yankee Ai wo Chikau
ヤンキー愛を誓う
The death of her brother was caused by Kana who was a little girl then. Because of that, her parents got divorced, and she is still on bad terms with her mother. Various matters such as her attempted suicide and quitting school followed, and finally her mother deserted her. Then a man named Yoshiie appears before her!?
from mangaupdates