Di Daughter's Rebirth: Sheng Shi Wang Fei - Chapter 40

A certain Xiao wang* embraced her who was in men’s clothing, rolled over onto the ground, not neglecting to kiss her with burning kisses.

She who was going to war on behalf of her brother yelled out, “Wangye*, I am a man! A man! Do you see clearly?”

Wangye acted as if nothing happened, accurately captured two fragrant, soft and sweet lips, one kiss after another: “This wang am recently sexually inclined towards males!” A certain female’s tiny waist was being crushed as she tearfully pled, “Wangye, please spread the rain and dew!”

A certain Xiao wang: “There are many potential lovers to choose from, but this wang only wants one.”

She, Linghu Shui Yue, a military doctor from the modern era, has reincarnated into a stupid sixteen year old girl?

She stupid? Then she’ll stupidly hit Qi* wang! Fortune favors fools! How about changing a husband to play with? What is Qi wang? She heard that You* wang was the world’s most beautiful man! Sleep, of course one must sleep the world’s number one beautiful man! Marry, of course she must marry the man all the women in the world want to marry!

But, isn’t this man too black-bellied? There was no need for her to even think about it for the man voluntarily presented himself at her door and used all sorts of wiles and methods to marry her as consort! There’s a conspiracy! Then come! And see how she sees through the subterfuge and completely demolishes it.

- Description from Novelupdates

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.

The day she transmigrated it, she was already the wife of two men. She later became the Queen of the country. Her life has been cherished by seven men.

- Description from Novelupdates

There’s SIS in great Britain, CIA in the US. In Huaxia, there’s Dragon Division, known as the mysterious power of the East.