Reborn: Revenge of the Concubine's Daughter - Chapter 316 - How do you help them?

An unnamed 34-year-old Japanese NEET is evicted from his home following his parents' death.

Upon some self-introspection, he concludes that his life was ultimately pointless.

Walking down a street he intercepts a speeding truck heading towards a group of teenagers, in an attempt to do something meaningful for once in his life he manages to pull one of them out of harm's way before getting himself in the way of the truck and dying.

Awakening in a baby's body, he realizes he has been reincarnated in a world of sword and sorcery.

He resolves to become successful in his new life, discarding his past identity for his new life as Rudeus Greyrat.

Within the dream of the dreamer, the one who was dreamed of awoke.

… Borges

“I exist in the sunlight, the wind, between the heavens and the earth, and also in dreams.”

One night, Yu Hao, a college student who was at his wits’ end had an unexpected encounter with a mysterious visitor – “General” – who had dream travelled. He led Yu Hao in solving the countless riddles that abounded in the realm of the conscious, and lit up the fire beacons on the meandering Great Wall.

Thereafter, the darkness retreated, the sun rose, and when the long night was thoroughly lit up, the him who existed in reality was reborn.

The black dragon that roared, the lighthouse and demonic eye on the coastline, the rain forest before Chichén Itzá, the fierce beasts that wreaked havoc in the Colosseum…the bizarre projection of reality in one’s consciousness reflected the hidden place that the sunlight in reality couldn’t touch – the innumerable sins of the human heart.

The journey of seizing dreams continues, and one can only hope that the sun will continue illuminating the human heart.

…

Fire beacons on the Great Wall were lit up to signal a border invasion.

- Description from Novelupdates

A 29 year old civil employment exam student wakes up in a blank white room and meets a baby angel. This baby angel informs him that he died in his sleep due to heart disease like his father and grandfather. Remembering his mom and their last conversation he says that he will take on a series of life and death tests that the baby angel offers him. From this point on he must put his life on the line and fight in the stage called ‘Arena’. And Every time he clears a test he will gain abilities and weapons to increase his strength. All to clear the tests and get his life back. This is his story of his fights in the ‘Arena’.