Evil Emperor's Poisonous Consort: Divine Doctor Young Miss - Chapter 34

It took Gu Yu twenty years to realize that he turned out to be the vicious cannon fodder male supporting role in a novel.
Forcing the protagonist to sign a contract, and being playful and affectionate, he ended up with his family ruined and his family destroyed.
Just as he was about to establish a good relationship with the protagonist Gong and take advantage of the loopholes in the plot,
Who would have thought that the protagonist Gong in the book, and the ruthless boss who did not get along with the protagonist in the end, was actually his ex-boyfriend who was abandoned by him in high school? !
Oh ho!
Gu Yu: Thank you for the invitation, please don’t bother me.

Gu Yu, who was forced to follow the plot, faced the furious protagonist Gong who seemed to be about to commit murder in the next second. His ex-boyfriend,
With the wife of the future protagonist Gong in his arms, his current gossip partner, he numbly recited the lines: “I warn you, this is my man.”
Seeing Fu Yeyu, who was blazing in the eyes of the opposite party, who could pounce on him and tear him apart in the next second, he couldn’t help but reflect on himself: Why can’t I think about the protagonist’s attack? !

The main attack, the idler should be the heartless attack × the irritable boss suffers
Gu Yu×Fu Huayu

Content tags: strong, broken mirror, reunion, entertainment circle, wearing books
Search keywords: Protagonist: Gu Yu, Fu Huayu ┃ Supporting role: ┃ Others:
One-sentence introduction: Destroy, I’m tired
Conception: go round and round, or return to the original origin

- Description from novelbuddy

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

The most famous deed of this princess was her words to her younger brother Liu Ziye.

When he became emperor, she told him, “Although your highness and I are of different sexes, we are the children of the same father. Why can you sleep with so many different women, while I must be only with my husband? This is so unfair!”

And after the Emperor Liu Ziye heard his elder sister’s words, he ridiculously thought it made sense. So he immediately corrected his “wrong ways” and painstakingly selected thirty handsome youths for her to enjoy.

Chu Yu awoke in the princess’s body and realized that she had obtained a male harem of three thousand; should she take just one to drink, or keep all of them?

- Description from Novelupdates

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.