I Am the Source of Darkness, Causing Chaos in the Eternal Heavens - Chapter 17 - The Dilapidated Qingxu Holy Land, Fifty Thousand Years Ago

System: You are now a lowly male supporting role, a passerby who wants to go offline at any time, please keep secretly and grow vulgarly.
Shi Yan: Very good, thank you for your suggestion.
The first world: Shi Yan, as a little prince born in a cold palace, made himself an emperor.
The original male and female protagonists, under his witness, became grudge couples.
The second world: Shi Yan, as the youngest son of the princess who died tragically, made himself a powerful minister over ten thousand people.
The original male and female protagonists, under his witness, became grudge couples.
The nth world: Shi Yan, as a genius in the world of comprehension, has made himself the number one powerhouse in the Three Realms.
The original male and female protagonists, under his witness, became grudge couples.
The system feels that something is wrong.
Shi Yan instead persuaded him: Let the male and female protagonists come together in the end no matter what the circumstances are, isn’t it the self-cultivation of the tool man and the male partner?

Content tags: Kuaichuan Shuangwen Metaphysics
Search keywords: Protagonist: Shi Yan ┃ Supporting role: ┃ Others:
One sentence introduction: The male partner is beautiful alone
Purpose: strong heart, unmoved by wind and rain

- Description from novelbuddy

Mizuno Eiji, a siscon high school student, receives the worst news from his older sister: “I have a boyfriend now.”In order to identify the man who stole his sister, he follows her on a date and… sees a suspicious figure watching the two of them as well.That person is Hasegawa Aoi, his classmate who is famous for hating men despite being a beautiful girl!“I can’t believe you are actually a brocon.”“I never thought you are a siscon.”In order to make their beloved sister and brother to break up, the two of them formed a mutual relationship and went on a date as fake lovers while following the brother-sister couple… Aoi kissed Eiji on the cheek.“You’re the only one who is… special.”Brocon x Siscon, two people who shouldn’t be able to get along is actually a perfect match…!?

On the will left behind by the 14 year old suicide victim K:

“Taku Sugawara is the devil. Nobody should believe his words.”

An Nuan thought that she was going to have her happy ending, marrying the love of her life when the man left her on their wedding day.“Pei Zhi Yi, the moment you step into the elevator, it's over between us.”An Nuan thought that she could stop her fiance from leaving, but that man still left for the other woman.The wedding hall was prepared and the guests had all arrived. With no groom beside her, An Nuan decided that she would marry anyone willing.“An Nuan, if you are willing, then how about considering me as your groom?”Unexpectedly, the young master of the Lin family, Lin Xiao Feng stepped forward to offer himself.An Nuan did not expect much from this marriage, especially when they both agreed that they were seeking to gain something through this marriage.Lin Xiao Feng needed someone as his wife in his political career. Meanwhile, she just needed to marry someone to get over Pei Zhi Yi. As someone who was disappointed by love, An Nuan no longer wanted to believe in love.She never thought that the marriage that she did not expect would turn out better than she had expected. Young Master Lin would pamper her and support her whenever she needed help.Wasn’t their marriage just for show?