The Gu Family's Sweet Little Darling

Content warning: pampered child-rearing (a little boy); the main characters have no romance, but there is a secondary couple. The writing is amateurish.

When Gu Nuo'an, the Gu family's real young master who had been missing for three years, is brought home, the three-year-old boy is so thin and timid, yet so considerate that it breaks your heart.

The impostor young master, Gu Jinchen, who had stolen his place, is a transmigrator with a System. He constantly bullies the timid, soft-spoken Gu Nuo'an, until a mysterious force swallows him whole.

The eldest brother, who holds power; the sensitive second sister; the gentle third brother; the cheerful fourth brother; the fifth brother, who has reclaimed his body; and their guilt-ridden parents all join in to shower the little one with affection.

After three years of struggling through hardship, little Nuo finally finds himself wrapped in overwhelming love. His wounds slowly heal, and he grows up safe and happy.