Both of the drama share the same plot, leads start as friends until one of them starting to develop feelings. The only difference are the personalities of the characters in each drama as well as their age as it plays a major factor to the time we were not love drama.
The plot reminds me of Misty. Strong willed and ambitious female protagonist with a man beside them who is willing to do everything to the female character for love or obsession. If you're looking with similar feel and character try this drama and it'll give you an emotional rollercoaster ride.
Similar plot, same character personality and storyline but with different background and culture. You can absolutely mistaken this a remake Nigeru wa haji da ga yaku ni tatsu. Both are cute in their own ways plus the cat. Either of this drama you will definitely enjoy.
If you enjoy the storyline, concept, and the soundtrack in Age of Youth then you will get the same vibes and experience in Soulmate. Although the latter is made for adult and mature audience I think the concept in Age of Youth was taken from this drama. While watching this series it truly reminds me of Soulmate with awesome advise about love, dating and marriage.
The leading man reminds me of Kang Ma-Ru;s character who atones himself of the mistake he did in the past. How he also sacrifices his life and happiness for people he loves. If you fell in love with Kang Ma-Ru you might also fell in love with Soda Ren.
same love story happening inside the company. a love triangle dilemma.