like the title says, friendship that blooms into love. Or friendship with little boundary between friendship and love.

They can be childhood friends or just met recently, just that it starts as either just as friends or as they think they're just friends but never were. Also, dramas where there is NO CLEAR LINE between friendship and love and the leads cannot decie to be friends or more// and/or they struggle to confess. Or dramas where they think they are just friends but there's tension and it takes alot for them to realize their feelings. Also dramas where they're just friends but flirt alot to the point that you wonder if they're just friends.

The only dramas I know so far are like this are  Over Time and Bubblegum.

RECOMMENDATIONS? 

In Time With You 

Dear Sister -  the younger sister story 

Dream High 

Hormones 

Kill Me Heal Me

All the reply 97-94-88

It's a common story plot so there's lot of drama with this storyline 
"Fight for my way" is currently airing and there is a friendship which has some tension, it's very good so far
Fifteen Years to Wait for Migratory Birds - a must-watch, if you like this theme

The Time We Were Not in Love - pretty average, but watchable if you like the lead actors

Weightlifting Fairy Kim Bok Joo - awesome chemistry between the leads