whale/dolphin manhwa i cant find T_T

helllo everyone me again please if someone remembers the name of this manhwa (not manga) reply to me

the story first focuses on a dolphin to turns into a human because he wants to find his first love but his first love already has someone

the second couple then gets introduced which is a killer whale (im pretty sure) who falls into love him his carer

and then theres a 3rd couple which is a rare pink dolphin and a human

the art is very like idk how to say not "amazing" kinda like a few years ago kind art but the story was very touching and made me cry here and there

pls does anyone know?? T_T ┗( T﹏T )┛