It never actually gets serious and as some have said episodic but there is interesting character backstory. The fighting is more comical in nature than life endangering and the character designs are quite nice.
I love the first opening and its a completely light hearted show that never takes itself seriously so the viewer really shouldn't either. It's pretty funny at parts and parodies at times other animes which I found pretty hilarious, Sailor Moon, Ace Attorney, Shokugeki no Souma etc but still stays pretty true to its own rhythm.
It never has a big climatic fight or anything so if you hold out for that you will be disappointed but there's a second season happening so maybe it gets darker then?
The main girl character at times is pretty bland I find but not dislikeable. She's just a very non reactive sort of character. The other characters are also interesting in their own way and although my favourite is Rinne, his grandma probably comes second.
If you're after something fun, cute, lighthearted with a bit of ghosts and slight romance then this is definitely worth watching.
