After I Quarreled and Separated from My Sister in the Last Days, I Became Invincible

[The end of the world + super powers + invincibility at the beginning + hidden strength + boss reincarnation in another world] My lovely sister is in early love? We had a big quarrel because of this, but this did not become a stumbling block between our relationship as brother and sister. It was obviously easy to talk things over and reconcile, but God played a little joke on us. The end of the world is coming, and my sister and I are separated. What will be the fate of the two brothers and sisters?