I've been watching God of Study with Kim Soo Ro and Jiyeon from T-ara. It's based off the Japanese manga, "Dragon Zakura" and there was a J-drama of the same name. I haven't watched the Japanese version so I can't compare, but this version is pretty good. Kim Soo Ro is great, and Jiyeon is just too cute in it. The other girl actress, Go Ah Sung, is pretty cute too and she gives me an Inoue Mao vibe. The kid who plays the main student, Yoo Seung Ho, is a pretty good actor too. The ending theme song is sung by 4minute too.
I guess I should watch Dragon Zakura later cause it has Yama-P, Teppei, Abe Hiroshi, and Aragaki Yui though. So I have a feeling the Japanese one might be better?