This is my new favourite Spanish novel! ♥_♥ I hope it'll be available in English one day, so that more than a few of you can discover it.
It's an amazing concept. When I first heard of it, I thought of the myth of Persephone, of course, but it doesn't have much to do with it apart from the six-month periods. The plot plays with the butterfly effect, and the storytelling is both poetic and modern (including a few texting bubbles, I love that).
Hana (aka Haneul) is half Korean. There's major f/f, minor m/m and a trans male character.