What is the main story of "Welcome" sung by Charlie as the theme song?

I told the story of three janitors working hard in the city. Like many other contemporary young people, they are ordinary little people and have been trying to gain a foothold in the city. From a damp underground dormitory to a 50-square-meter one-bedroom apartment, we can see the pressure of urban youth's survival and have warm time in such a difficult living environment.

The three brothers take care of each other. Although their living environment is poor, they have at least a small space of their own. In this small space, everyone embraced each other and opened up a warm sunshine room. A group of ordinary people illuminate each other and give each other warmth. Ordinary people will find themselves extraordinary in ordinary posts. Let's feel the attitude of the three brothers towards life. Although life is not easy, everyone can live his own life as long as he works hard, which shows us the courage of life.

Life is not always smooth sailing. There are always all kinds of difficulties waiting for us on the way forward. Many times, we will reflect on whether this road really suits us. What will happen in the future. It will also linger between staying and not staying, making people doubt whether their original choice is correct. Maybe they will have a different life after they leave, instead of living in a narrow space as they do now. Inside, we can also feel the smell of fireworks. The life of contemporary youth may not be so earth-shattering, without the counterattack of genius, but we have seen the tenacity of life.

Charlie sang the theme song Welcome. The title of this theme song is "I saw us". This song gives us strength to believe that his bright tomorrow belongs to you and me. We see the melody of positive energy, which also leads us out of the road of confusion and heals our hearts. Let's strengthen our hearts and follow our choices. As long as we take life seriously, life will also give us the answers we want. Maybe the answer is not so easy, but we can always find our own life on the way forward.