Island Survival Game

Before me stretches a vast ocean, and beneath my feet is nothing but a four-square-meter raft, drifting alone on the sea...

"Ding! System activated. Welcome to the new world! Do your best to survive and thrive. The victor will receive a special surprise..."

With nothing in my hands, how am I supposed to survive?

No problem! I still have a System!

"Ding! Congratulations, you've obtained a lottery System! You drew the 'Ex-Girlfriend Water Purifier'!"

What? System, are you messing with me?