Then there's the work that everyone presumed was shoujo but wasn't. Much like The Ancient Magus' Bride before it, this is technically shonen but still managed to capture something strange yet beautiful.
THE GIRL FROM THE OTHER SIDE: SIUIL, A RUIN: (Totsukuni no Shoujo), by Nagabe. First published in 2015 and first published in 2017.
PLOT:
Deep in the forest, past the abandoned village, lives two beings in a cozy cottage. One is Shiva, a friendly and curious young girl who waits everyday for her auntie to return for her. The other is nameless, known only as "Teacher" to Shiva. He cares for her and protects her, but makes her promise one thing: that she never touch him. He bears a curse that turned him into a dark and demonic-looking creature, and if Shiva should touch him the curse will spread to her. That's far from the only danger she faces, though. Not only are there soldiers looking to kill anyone who might be tainted with the curse, there are other creatures like Teacher whose intentions are nowhere near so noble.