Non-linear narrative.
Tatsumi can use the voice of the waves to let people do his bidding, and it terrifies him. Kazushi is a stranger he meets on the seashore on a trip. But there's more than what meets the eye between these two 'strangers'.
I got so fucking emotional over this. Their love was beautiful and overwhelming. Definitely just became one my most favorite mangas of all time.
See you later, Mermaid