"can you give me happiness??" "what do you mean?" "let me kiss you jeen" He is my brother,why he acting like this?

WARNING!!! THIS MAY TRIGER SOME!!!! YOU HAVE BEEN WARNED!!!! THIS IS NOT INCEST!!! This is a story about a girl named (Y/N), who lived with her brother. Their parents abandoned them and he took care of her like she was his daughter. He is now very overprotective of her and is yandere over her now.