Nagi no Asu kara, Kimi no Na wa. Recommendations
On the surface, these two might seem like they don't have much in common, but they have a similar core plot that aren't usually in other anime. At first, the Nagi no Asu kara starts very slow as a school slice of life with some fantasy elements, but then something unexpected happens and changes the entire dynamic, putting aside the shoujo parts and focusing on a unique plot to save a group of people. This is very close to how Kimi no Na wa presents its story, it first appears to be a cute story with a strange fantasy twist then the characters find out
Both feature teenagers exploring the strange interconnections of love amidst supernatural occurrences in a tiny seaside town with strange rituals. Both have drop-dead gorgeous art and are created by some of the most respected storytellers in anime (Shinkai Makoto and Okada Mari). Both make clever use of an overused trope (body swap and timeskip).