Check out 100 Days My Prince! It starts airing today but seems like it will be a historical version of SKL - amnesia, rich male lead and main actress is the same.
If you liked main actor, i suggest Reply 1997 which is very funny romantic comedy/family drama. (And for the love of god, dont watch High School King of Savvy! Its the worst drama i've ever watched... but Seo In Guk was still good in it)
If you want some cute romance drama is suggest Weightlifting Fairy Kim Bok Joo or Sassy Go Go and if you want an inocent cohabitation drama go for Because This Is my First Life