Owari no Chronicle - Volume 2, Chapter 28: Their Confirmation

Qin An was a former senior grim reaper who retired after serving the underworld for thousands of years. Because of his outstanding service and had enough merits, he was given a chance to become a human and unexpectedly transmigrated to the Interstellar era. But, how can he live his retirement days when has no money and everything? So, Qin An entered a reality talent show for idols and became an existence that everyone admires to.

Mortimer Zhu is an extremely unfortunate high school student who accidentally enrolls into an academy of a dubious nature, where it is the norm to jump in front of moving trains, get dismembered during orientation, and crushed by vindictive bouncing classrooms. Can he stay alive or will he die from the rigors of school? Why have evil spirits suddenly acquired a taste for his flesh?

- Description from Novelupdates

Heaven and Earth serve as the guesthouse for all living things, with Time being the sojourner since time immemorial.

As with the difference between dreaming and awakening, the distinction between life and death is diverse and confused, and changing.

What awaits us beyond time, once we have transcended life and death, heaven and earth?