Sam and Ding-Ding's love story was very amazing ever since they started going steady in Forensic Heroes I. Ding-Ding is a very sweet, young lady who loves to wear sneakers. Since Sam did not want her to suffer wearing heels on their wedding day, he suggested her to wear sneakers. They both searched for it frankly and finally spotted one but could not find her size. So out of his love for her, Sam burnt the midnight oil for days to DIY a crystal sneaker for her. Ding-Ding, unknowing of it, also made a crystal sneaker keychain for him. They were meant for each other!
However, two days before their marriage, Ding-Ding got into an accident. Due to serious injuries, she died. This led Sam to depression for a period of time. However, he soon got back on feet and returned to work to continue to find the killer which is responsible for Ding-Ding's death.
A couple of months later, after he had soon gotten over it and slowly let things move on, He started to admire Bell, but did not had a crush on her. Bell got a misunderstanding that Sam likes her as they both share their love tragedy to each other.
Many people might have preferred the couple Bell-Sam, but however (without hard feelings), in my opinion, Ding-Ding had always been somewhere in Sam's heart though she had left out of the sequel early in the series due to a busy schedule. Their love story has always been part of this drama and shows many touching scenes.
