I, the Weakest Traveler, Start by Taming the gods of the Old World. - Chapter 23: Prime jerker

Fate is a funny thing.

They had been together since high school. Together, they faced the cold faces of their parents and the satirical or disdainful eyes of others, started a business and experienced all kinds of ups and downs. When their company was on the right track, Zhishu He was asked to give up his career to stay at home, while Wenxu Jiang gradually changed and began to indulge in merry-making. However, Zhishu chose to forgive him. Zhishu got an incurable disease, while Wenxu Jiang was still indifferent. Zhishu still chose to forgive him. Love had become a kind of habit, which was equal to an incurable disease.

In a peaceful sunny day, Zhishu quietly left Wenxu Jiang and the house in which they had lived for a long time without an advance notice.

Soon he was gone. A man with pure spirit and deep love for Wenxu Jiang disappeared from this world forever…

Sometimes love cannot stand the test of time. Someone will not know how to cherish the love until he loses it…

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

There are 5 books on the 6 sworn brothers in a serial called streamer (流光系列). ‘They are rich, handsome and powerful. These book are on various types of love as well as on the bond and mateship between the brothers. Book on youngest 6th brother.

Chen Yu Bai (3rd brother) & An Xiao Yi – Chen Yu Bai is a sharp, domineering & cool man whereas An Xiao Yi is a foolish, childish & innocent girl. He is her boss & she is his secretary. He bullies her yet at the same time will not hestitate to protect & shelter her. Thus, she can always rely on him. Their relationship is a funny one on how opposite attracts.

Li Wei Ran (5th brother) & Qin Sang – Li Wei Ran and his cousin Qin Song fell in long with Sang Sang who is An Xiao Yi’s best friend. Sang Sang sees Li Wei Ran as a good man. He is polite, patient and passionate whereas she is independent, intelligent and interesting. They are a perfect pair but she is afraid to love so he has to work hard to convince her he is worthy of her love..

Short sequel on their children.