Same here.
Part of the show has a nice poetic feeling to it, eventhough the tales of the past and the rules of the present remind us human tribes are really uncivilised.
Tsugumu probably is the one leading the show in the right direction. But I don't know yet wether he was or will have feelings for Manaka. It felt like he loves her for what she is-like anything sea related-, rather than have feelings for her yet.

Regarding the childhood friend, although I understand where he comes from, his tsundere side really is gritting.

All in all, it's really nice to watch for now.