Island survival I have got F- rank talent

Marooned on a primitive, average-sized island, Lily, armed with an unshakeable cheerfulness and an F-rank 'Random Expansion' talent, faces certain doom. This isn't a power fantasy; her ability adds only a minuscule amount to one random property of an object, requiring hundreds of uses for even a noticeable change. With a 7-day grace period to establish a foothold, Lily must painstakingly expand her meager resources - a single tree, a handful of berries - into a sustainable existence. Every meager improvement is a testament to her grinding effort, a defiance against the island's unforgiving nature. But when strange, intelligent creatures begin to stalk her, Lily realizes her true battle isn't just against hunger, but against an insidious, evolving threat that seeks to claim her island, and her life.