Rei da Panificação, Kim Tak Goo (2010)

While the two dramas don't really look similar at first glance, there were a lot of similarities in term of the love rival and family confict plotlines. Not to mention that both dramas had Jun Kwangryul and the late Jeon Misun playing similar roles as parents of the protagonist.

i do find it similar because of the 4 main character and the story are somewhat same and they both have teacher and competition...