Last 4 Days in Heiwa City

The world is ending. The meteor is going to hit the Earth on April 4th. But the people of Heiwa City are mostly at peace now. They enjoy the rest of their day with peace and happiness. But some of them still feel that their life is unfulfilled. They still have regrets, or loose end still left untie. You are Yuki. You're just another citizen of Heiwa City, and you've experienced enough of the world and already got bored of it. But the god of death has a different plan. After the world is destroyed, they want you to go back to 4 days before everything ends and tie up all the loose ends for all of them. One such group of troubled souls is a family who wants to use their last moment differently. How will you resolve their issue?