Czakhareina:
Love O2O
Other to check out are: Our times (taiwan movie), kimi ni todoke (japanese drama)
Other dramas that had very similar light fun refreshjng coming of age romance are '15 years of migratory birds amd 'Love til the end of summer', except the ending jjst breaks your heart cause botj are quite tragic.
I really, really enjoyed Love O2O so I'm going to assume your other recommendations are great by default! I was thinking about watching Love til the End of the Summer earlier, so maybe I'll start there~