Shiawase wo Anata ni (Link)

A boy and girl meet in the afterlife. He was killed by his abusive father, and she committed suicide after being bullied, which she regrets, since her life was otherwise pretty good.

The each draw a ticket for their next life from the lottery. The boy receives a happy, normal life, but the girl has the misfortune to receive a painful life with an abusive family. The boy swaps tickets with her, under the guise of just looking at each others' tickets, and dashes through the gateway to be reborn, exclaiming as he goes through that, after all, he's used to it.