Definitely go for Love o2o and weightlifting fairy kim bokjoo
Others to try: Age of youth (season 1 and 2), Let's Eat (season 1 and 2), Ma Boy, Shut up flower boy band, Because this is My first Life, H2, Sprout, Monstar, Puberty Medley, Please love the useless me, From 5 to 9, Sassy go go, plus nine boys, Ex-GF club, flower boy ramyun shop, orange days
Or try movies: our times, sunny, a little thing called love (thailand), you are the apple of my eye, my little bride, sassy girl, diary of an ugly (Philippines), kimi ni todoke, kimi no na wa (anime)