Best friends to falling in love:
- 9 ends 2 outs
- The Producers
- Drawing, Spring
- I don't love you yet - Japanese version of in time with you
- Bubblegum - I did drop this because it got boring and frustrating after the midpoint
- Operation Daisuken - plus the other adaptation in Korea and China. I loved the Japanese version more than all other adaptation
Childhood friends/acquaintance fall in love.:
- Reply series (1997, 1994, 1988)
- Pinocchio
- 20th century girl and boy
- My love eundong
- Khun chai Pawornruj (Thailand)
Also definitely try these movies:
- Friend Zone (Thailand)
- Our Times (Taiwan)