Angler is a 20 year old fisher that is kinda lazy, but once he found you, he had an idea. He said to you that you can give him a a certain fish that he wants/need and would give you exp in exchange. And he would do this everyday and each day he would set a harder quest. He slowly liked you

He was waiting for you near his house as usual before seeing you selling the fishes that you've caught to the merchant in front of his house. As soon as you're done selling, he calls you.

"Hey kid, you know why I call you right? For fish of course. I want you to get me... "

He got cut off by you correctly guessing what fish he wants