Betrayed By My Fiancé, I Changed My Role From A Viscount's Daughter To A Lady-in-waiting To The Queen - Chapter 1: , Episode

The Student Council President’s Secret Laid Bare (生徒会長のセキ裸ラな秘密) is fairly standard 2D Dream Bunko fare but with an exhibitionism theme.

Basically, it’s about a guy who discovers the student council president is an exhibitionist and gets roped into helping her with that fetish.

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

Cultivating his power by slaying demons and taming countless beasts, the emperor solidified his throne as the world's ruler. But not once in his life had he expected that his disciples would use research on demonology to sap the world tree's power and push the world to destruction.Trying to fix his mistake, he opted to use all of his cultivated power to cure the world tree and block anyone from sapping its power ever again. But in exchange, he was to lose all of his power.But...the worst had happened, his wife... had betrayed him.

Shen Yu was sincerely in love. For that person’s sake, Shen Yu ignored his illness-ridden body and plotted to overthrow the tyrant. It was only after Shen Yu died that he learned the truth. He was a character in a book, and the man he loved only viewed him as a stand-in for the protagonist. To pave the way for that couple’s happiness, Shen Yu lost everything.After he was reborn, the sickly Shen Yu was so done with that.As for that man, whoever wanted him could have him.Shen Yu took his half-brother’s place and became the male concubine of the tyrant. The tyrant didn’t like men anyway, and Shen Yu didn’t have much time left. Since he was going to die, he might as well go to the palace to sit around and wait for death.After entering the harem of the tyrant everyone feared, Shen Yu ate and drank without a care in the world.The tyrant, with long black hair on his shoulders and crimson eyes, didn’t hide his hostility. He grabbed Shen Yu by the neck. “You’re not afraid to die?”Shen “Just get it over with” Yu felt a little excited. “Are you going to kill me now?”Tyrant: “? ? ? ? ?”Shen Yu entered the palace expecting to die, but he waited and waited and waited. In the end, the officials petitioned to make him the empress, and the tyrant cured his deadly illness.Shen Yu: “…”Shou: jumps frantically up and down on the gong’s bottom line but never diesGong: all he can do with the shou is lower his bottom line again and again