Reborn, he returns to seven days before the disaster! In his past life, Leo Lynn was backstabbed and abandoned by his girlfriend and colleagues. He awakens the Apocalypse Unlimited Check-in System. His ex-girlfriend tries to trample on his life, unaware that the reborn Leo Lynn is cold-blooded. He settles scores with betrayers, hoards supplies, and travels the chaotic world alone in his RV. He protects only himself, turning the tables against all odds!