Grand Blue

is a manga series written by Inoue Kenji and illustrated by Yoshioka Kimitake. It was first serialized on the good! Afternoon magazine starting in the May 2014 issue.

Plot
A new life begins for Kitahara Iori as he begins his college career near the ocean in Izu city, full of excitement for his new life. He will be moving into his Uncle's diving store "Grand Blue." There he finds the beautiful ocean, beautiful women, and men that love diving and alcohol. Will Iori be able to live his dream college life?

Other Sources
Grand Blue on Japanese Wikipedia