Doutei no Ore ga Tensei Shitara, Koushoku Senchou

Official English on Renta

Hiroto Izumi is a boring businessman whose only asset is his passionate work ethic. All his life, he'd hoped to get laid by the time he turned 30. But, on the night of his 30th birthday, he falls unconscious in an accident. When he wakes up, he hears someone calling him captain... To his shock, he checks himself in the mirror to find himself dressed like a pirate! Turns out, he's been reincarnated as the captain of a pirate ship!!! To top it off, he's apparently famous for spending his nights "swashbuckling" with the crew!
Kyle, the ship's cook, helps Hiroto come to grips with his predicament. And oh boy, Kyle's everything Hiroto's ever wanted in a man...
In this thrilling romance, an "inexperienced" businessman is reborn as a hot pirate captain who loves to bottom! Will he get some action at last!?