in some ways I actually appreciate kdrama noona romances, before I was also like you (though I'd still have issues…
I don't really have problems with age gaps irl but in kdramas I tend to find noona romances better than older man/younger woman. In noona romances the male is usually more mature for their age which makes the age gap less creepy. While older man/younger woman series the female lead is sometimes very immature for her age which makes the age gap very creepy to me.
I watched it a long time ago but I do remember that the cinematography was pretty good. It's pretty light-hearted and there's not a lot of drama or anything like that. I would recommend it but you won't miss anything by not watching it.