Star Dream Ending Plot Development Guide

What is the story development plot of the final ending of Star Dream?
Overview of the outcome
The world war was unprecedentedly fierce, and after decades of star dreams, not only did mankind not restore peace, but the world was in ruins, nuclear winter shrouded the earth, and human beings could no longer see the starry sky. The number of people in the world has been reduced from seven billion to 100,000, yes, only 100,000 people remain, on the verge of extinction, and the desire of Yumemi has completely vanished.
And the male protagonist has become an old man who is getting thin and thin. For decades, the male protagonist has adhered to the legacy of Dream Beauty, continued to carry the projector, relying on his own knowledge to spread the beautiful scene in the planetarium between the world, and the male protagonist became a star person who spread the starry sky scenery. However, the world is still moving in the direction of destruction, and in the end, the lonely and helpless male protagonist has fallen into the snowy wilderness, and it seems that he has reached the time of death. Although the male protagonist was unwilling and failed to complete the long-cherished wish of resurrecting Mengmei when he was young, he seemed to be able to only admit his fate. It was that the three surviving human children found the male protagonist and brought him back to the stronghold of this small human tribe.
At this time, the plot seems to begin to unfold in the direction of hope, the male protagonist continues to carry out the mission of the star man, the legacy of the dream beauty is passed on, the male protagonist relies on his own knowledge, and finally can show the three children the starry sky he saw in the past, the three children were amazed by the beauty of the starry sky that the world without nuclear pollution in the past peaceful period, determined to worship the male protagonist as a teacher, pass on the mission of the star man, and continue to show the beautiful existence of the universe to mankind
The people of this tribe made a resolution, determining that the star people no longer had the need to exist in the world, and issued an eviction order to the male protagonist, prohibiting several children from following the male protagonist. The male protagonist had to prepare to leave, and when he helplessly packed up his things, the male protagonist inadvertently discovered that there was actually a dream-like robot that had not started in this stronghold!
A glimmer of hope can't help but be ignited in my heart, Mengmei is a robot, as long as you find the carrier, insert a memory card to make Mengmei come back to life! The male protagonist's lifelong pursuit, it is this, the male protagonist of the twilight year of the whole body of the sudden refreshment, immediately take out a lifetime of hanging on the chest of the dream of the memory card, the dream of the final resurrection, this life is finally no waste, when the male protagonist began to look for the memory card slot on the robot with great interest, but found that the design of this robot and the dream beauty robot is not the same, the slot position of the dream, this robot does not.
The fire of the male protagonist's life was finally burned out, and the spirit that had been played was just looking back. The man shouted, covered his chest, and fell down the steps.