Quick Travel: the Host Has to Work Hard

[1V1, two male protagonists! ! ! Gu Changsheng, although named Changsheng, was an unlucky man with a very short life. After being diagnosed with a terminal illness in the hospital, he was tragically involved in a car accident as soon as he left home. As a blessing in disguise, he met System 9527. After a pleasant negotiation, one person and one system reached a consensus and started a slow journey through time. World one "Gu Changsheng? What a good name." Someone touched Gu Changsheng's head. "My immortality, we will live a long life together." World 2 "Changsheng, will you love me this time?" Someone looked lovingly at the sleeping little kid "Don't be afraid, I'll be here this time." … After several worlds, Gu Changsheng got a glimpse of the truth of the world, and how to break free from the shackles of this long cycle.