Soko wa Sawaru Natte!: Kasshoku Yaseiji ni Semararete

The story starts with Natsuki, a genius hacker, and his gang of criminals. After a heist, they plan to sail away to the Southern Islands until the heat dies down. However, a storm capsizes the boat and shipwrecks Natsuki! After waking up on a mysterious beach, Natsuki realizes that he is stranded with little to no hope of being rescued... Just then, Adone, a black-haired, tan, apparent native of the island appears. He's wearing a revealing loincloth and carrying a spear. Not understanding the language of our protagonist, Adone inspects Natsuki for danger by touching him all over. Finally, an embarrassed Natsuki reluctantly agrees to take off his clothes... Just how far will this relationship go? Will Natsuki ever get off this island!?
(Source: Renta!)