Highly recommend "mothers spirit" fits your description perfectly
I misread your post, sorry!
Yasss Mother's spirit is the reason I wanted to find more 'island' like manga!! I love love love it so much (I always re-read it every month cause ヾ(❀╹◡╹)ﾉ~ it's just so pretty!!)
It's okay! I am still gonna give your recc a read!
I also recommend https://www.mangago.zone/read-manga/the_chronicles_of_pulau/
Hellloooo, I am looking for any manga where they end up on an island and the native of the island(s) fall in love for them? I'd love to see all manga (one-shot or multiple chapters) anyone has and it can be Het lovers or Yaoi or even those Fantasy-based ones. Send me what you got my friends! (๑•ㅂ•)و✧