Mentally unstable Jonghyun, haunted by years of abuse as decided he needs the pain, he loves it... after all... he has to.

Promising himself to feel the ultimate pain he is determined to kill the first person he falls in love with

that is until he meets Taemin...

Will his mental instability kill Taemin? or will Taemin be able to fix the cracks in this broken heart in time?