It is about a girl whos sister was a doctor and she commited suicide. She was meant to marry this other doctor at the hospital and be like a super couple or something (the sisters dad is the chairman of the hospital?) then the older sister commits suicide and so the younger sister has to marry the doctor and well thats all i remember and I really want to finish it but I cant remember the name >.< please help. Thanks

Not so sure about the suicide part but otherwise Hatsukoi wa Marude Yaiba no You ni fits perfectly...

~4400 manga completed
~1700 ongoing...

yeahhhh this is the one 🙂 )) thank you so much 🙂