Overall I enjoyed this drama. The synopsis on here is a little 'off' because a big factor in the story is Rembrary wanting to return to his realm and needing to figure out what caused his expulsion in the first place and why. Also some characters are incorrectly named, like The Evil One.
The genre is definitely teen, supernatural, comedy, romance, with some emotional and action content; in that order.
The acting was fine, with a watchable cast and story that kept me engaged.
Loved Park Sang-nam as Sa Gam-jae.
Kim Min-Gue (Kue/Gyu/Kyu!) carried the ML role well, making some scenes I would usually find too cringeworthy, bearable.
I would love to see him head up a more substantial drama/role one day... soon I hope.
I am not that familiar with FL, Go Bo-gyeol (playing Kim Dal), but she fit the character well and their chemistry suited their roles, as both were inexperienced and innocent in terms of romance, so it was never going to be 'sizzling'.
The only actors I felt seemed a little uncomfortable in their characters, were Lee Jang-woo (The Evil One) and Cha Joo-young (as the deity, Redrin).
I didn't find it a struggle to finish this at all, so for my personal benchmark, that means it wasn't bad. It's light and easy to watch.
As mentioned before, it does have a 'young' feel, so if you're looking for something a bit deeper, with a more substantial plot, it might miss the mark.