Abyss Dominator System - Chapter 2 - 1: Activation of the Abyss Dominator System_

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.

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.

Once again, Ye Zhen Zhen had lost her memories. When she opened her eyes once more, arranged in front of her were——

1. A Maternal Grandfather, the Murdered Victim

2. A Large Inheritance

3. A Deeply in Love Fiancé

4. An Overbearing Maternal Uncle and his Wife

5. A Docile Servant

6. The Aloof, Cold, Abstinent Doctor in Charge of the Case

7. A Seemingly Difficult Police Officer

Reincarnated as a detective, Ye Zhen Zhen stared dubiously at them all. Who was the murderer? Was it her? It…?

Only one was the real murderer, but there was far more than just one culprit.

- Description from Novelupdates

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.