I guess:
3. YOLO and Ni Gei Wo Ting Hao
In some way, the story in the movie and song are similar. How FL is forcing herself to smile when she's actually suffering inside, because no one's really care (well for YOLO at least some people notice after the boxing match), everyone is just passerby, viewer (and perpetrator/bully for the movie).
4. At the Threshold of an Era and Cheers
The format is flashback; all their life journey. The difference is in the drama it happens when he's old and reminiscing and that in the drama ML's life story is more intense. For MV it happens when he's on his deathbed.
And maybe
5. The Emperor's Cook and Daily Necessities
The similarity of both lies in husbands with sick wives, they both taking care of the wives, and remembering about how the wives always preparing foods for them, about their youth and how the wives are good to them, supporting their dreams and everything. But on the drama they meet and have arranged marriage and divorce and remarry. On the mv, they meet when they're so young and have all normal modern romance step.
