She's being severely bullied at school to the point that she's seeking out dangerous situations so that she can die. That's when she meets him. He saves her. She wanted to die but he gave her a reason to live. He fell in love at first sight. She's continuesly assualted and bullied at school. He was physically assualted by both his parents in the past and his mother nearly killed him once, so he finally fought back, grabbing a bat that he thought she'd use on him (he knew that if she attacked him with it, he'd die) and beat her (she almost died. I wish she had...). As soon as he could, he got the fuck out of there and started living on his own. The story has a lot of dark themes, but it also has a couple that are perfect for each other and love each other.
Wakeari Senpai no Kanojo ni Narimashita