The Transaction of Urban Rebirth

An accidental encounter, a strange green old man, a second life with memories. "A life-and-death deal, a life for a life." "Can I give half of my remaining life to the deceased?" "Okay." "How to trade?" "If you count from the moment you die, you can go back to that time with your memories; if you count from now on, life will continue." "You can't change anything in No. 1'S life." "Then what's the use of my life returning to the present?" "You have the memory of your first life, it's a superpower." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.