Exclusive Possession of Your Heart

I was given a second chance in life by having a new heart but I have lost my freedom. Huo Ji Kang, he wants me to become a substitute of his late girlfriend. Ziang He, he's my childhood friend who gave up everything. Wei Ru Fei, she is my heart donor's younger sister. One transplant surgery, has completely trap all 4 of them. Now, how can I face the love life of the owner of this heart.