Building a Villa on a Deserted Island

Stranded on a deserted island, while everyone else is desperately trying every possible way to survive, I've already moved into a villa and am eating and drinking to my heart's content. There's no secret to it: a powerful sign-in System beats everything else. Simply signing in, easily and effortlessly, is enough to earn all kinds of rewards. Is this really deserted-island survival? It feels more like a seaside vacation... How delightful...

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.