Need help finding this secret beach, threesome, quite whole some comic

Does anyone know a Western-style comic that starts in full color but, halfway through, the colors fade and the shading becomes much simpler? It takes place at a secret rocky pool near the ocean where the guy was chilling in the pool alone and naked and 2 older girls find him, one with black hair, and I don’t remember the other one’s details. It’s bisexual comic and the threesome was pretty good. The tone felt pretty wholesome overall. This one is pretty popular I think so please help