The Snow Queen (2006)

These are both lovely and melodramatic dramas about love and how it changes you. They both feature different but very dynamic lead males and are written and acted.

"Autumn in My Heart" and "The Snow Queen" both explore intense romantic dramas marked by emotional depth and tragedy. Each series features complex love stories where the protagonists face significant personal and relational obstacles, leading to profound emotional experiences. Both dramas are characterized by their melodramatic elements and focus on characters undergoing substantial emotional growth and personal sacrifice.

I mean it's as similar theme to this.

same impossible love, the leading men are both boxers and then chaffeurs, they even have similar names (Bok Gu/ Dok Gu) XD
A Love to Kill is more intense and tragic, The Snow Queen is quiet and nostalgic, but they are both great!

They both have similar vibes (tsq being more tragic). In both dramas the leads meet when they were younger, became friends, and suddenly lost contact. They both meet in the future without realising who they are. The both also have a similar age gap.

Sato Hokomi is a 29-year-old single woman with a sincere and honest personality. On her presumed wedding day, her boyfriend runs away and they break up. She finds out that her ex-boyfriend was cheating on her. Sato Hokomi decides to avoid men who are trashy and will make her cry. At that time, she meets Kuzuya Kairi, who is kind and friendly. She feels like it is fate to meet him. Kuzuya Kairi works as a photographer by day and a bartender at night. He is a mysterious person, who experienced big trauma in his past. Being influenced by Kairi Kuzuya and also determined that she wants to change herself, Sato Hokomi takes up boxing.