Hmm I feel like this might be kind of subjective, but I’ll give it a shot.
20th Century Boy and Girl- a guy and girl who liked each other as kids reunite as adults. I thought the way they portrayed the awkwardness was somewhat realistic, and the way they tried to handle their remaining attraction for each other.
Fight for my way- once again, childhood friends dealing with their romantic feelings for each other. It’s scary to think about making the leap to a romantic relationship with someone you’ve known forever, because what if it doesn’t work out? Then you’re losing a friend, so wouldn’t it be safer to just not do anything?
Something in the rain - okay, give this one up like halfway because the mom drama is too much, but the first 8 episodes or so are a great building up of this romantic relationship between a woman and her younger brother’s friend. The attraction and internal conflicts seem very authentic. I think the cinematography and music really contribute well to this.