Diving headfirst into the sun-drenched waters of Izu, this comedy follows Iori Kitahara as he begins his university life, dreaming of a picture-perfect campus experience. Instead, he is immediately ambushed by his boisterous new senpai, who drags him into the chaotic and alcohol-fueled world of the university's diving club, Peek a Boo. Torn between his desire for a normal college life and the club's relentless, shirtless antics, Iori must navigate a whirlwind of peer pressure, embarrassing situations, and the constant threat of being tricked into outrageous stunts. Alongside his cousin Chisa, who prefers the serene beauty of actual diving to the club's debauchery, and his equally hapless friend Kohei, Iori's days are a blur of muscle-bound seniors, awkward romantic missteps, and hilariously misguided attempts to fit in. This raucous comedy blends slapstick humor with genuine camaraderie, offering a wildly entertaining and surprisingly heartfelt look at the bonds forged through chaos, misadventure, and a shared love for the ocean's depths.