MTL - Steel Shell System - Chapter 6 acquaintance

Her step-sister just died three months ago. Now, she insists on marrying Chu Lui, who is supposed to be her future brother-in-law, the mind behind the Chu Enterprise. The world is sure that she, the new bride-to-be, had caused her step-sister’s death in order to seduce him.

A seafood chef inexplicably transmigrated into ancient times. Even though he landed in a family with a nobility rank, and theoretically was supposed to be rich, the most valuable thing in the house is a grey donkey…
Su Yu stared at the sky helplessly; in order to support the family, he could only take up his old profession and go out to sell fish.
Unfortunately, the royal family selected concubines from both genders. Even as a poor noble, he had no choice but to attend…
DISCUSSION TOPIC: Will I be selected if I display my fish-slaughtering skills?
“Meow!” His Imperial Majesty shook his tail.

- Description from Novelupdates

Damien was reincarnated as the villain in a shelved novel. He find himself on a wedding scene where the protagonist was destined to rob the marriage.He smirked while looking at the proud protagonist and arrogant heroine.Aren't you proud and arrogant? Let you know the consequences of offending the Villain!Destroy the background behind you and capture your family!Don't you love her? Aren't you the son of fortune? Kneel Down!!Now the choice is yours! Do you choose your family or the heroine?“Hehehe didn't the heavenly dao want to suppress and kill me? Let's see how I will play with your chosen 'son and daughters' to death! When the auspicious time will come, I will kill you too!!!”

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.