Hi guys,

i've been trying to find this drama after i watched it on TV 4 + years ago. Here's the plot

I think the guy's name was David?? He likes this girl who he went to high school with. she is a watch maker. he brings the same watch everyday and he wants her to fix it. it has water damage. eventually he confesses he likes her and she doesn't remember, but she goes out with him and comes to like him. it turns out david is really nerdy.

plot twist

david is acutally the split persoanltiy of the host, Aaron, who was the real david's best friend. the real david died years ago cuz he was trying to prove he liked teh girl. so he jumped off a cliff to prove it. aaron became so guilty that he became david. he lives in a mental hospital

the movie ends with the fake personality david jumping  off a cliff in front of the girl and it is uncertain if he lives or dies.

Thanks a lot if you guys can help me find it.