As summer arrives, four men—SATOSHI, IBUKI, YouTA, and TAIGA—travel to a southern island. Their individual temptations and desires intertwine, unfolding a lascivious relationship beyond limits amid the island's open atmosphere. At the shallow beach waters, they tease each other's bodies; in secluded spots behind isolated rocks, they meet in secret. Even in the pension's kitchen, they steal quiet moments for erotic indulgence. Shifting partners to satisfy their cravings, the four deepen their connections further. On the second day, SATOSHI and IBUKI wake up refreshed after morning orgasms, while YouTA and TAIGA recover from their previous night's kitchen sex. These lewd circumstances converge as the four head back to the beach. Spending private time together on a secluded shore, they nap in the sun until SATOSHI and YouTA sneak away. Hidden behind rocks, they entwine obscenely, groping each other's cocks and asses. YouTA sucks SATOSHI's cock completely, while SATOSHI brutally thrusts into YouTA's ass. And so, this filthy story of the four men continues into its third day.