Kai (カイ, Kai) is a character in Story of Seasons: Friends of Mineral Town.
Kai runs the Seaside Shack on Mineral Beach during the summer season. He's much more interested in soaking up the sun, and will comment that your character works too hard. He is friendly to everybody in town, with the exception of Rick. Kai is close friends to Popuri, and will be your rival for her affection.
If you marry Kai, he will not leave in Summer and will stay all year long. He will also work at his Seaside Shack year round, if you allow him to do so.