Dramas where ML & FL are Best Friends but later fall in love

• Something Just Like This
• Romance is a Bonus Book
• The Producers
• Drawing, Spring
• Movies: Friendzone, She's The One, Love Forecast
• Remakes of In Time with you
  • The time we were not in love (Kr)
  • I dont love you yet (Jpn) 
  • The evolution pf Love (chn)
  • In time with you (Thai)
• Not bestfriends, but more like in a group of close knit friends/circle of close friends:
  • Reply series
  • Fight My Way
  • Lovely Us
  • Go Ahead

100% fits (they already are best friends at the beginning of the drama)

• The Best of You in My Mind (2020) 

Kind of (Friends to lovers, they become friends/best friends and then lovers)

• Bromance (2015) 
• School 2017 
• Yamato Nadeshiko Shichi Henge 
• Weightlifting Fairy Kim Bok Joo (2016) 
• Long Vacation (1996)