Ms. Doctor Divine - Chapter 2662 - : Mission 48

“Why don’t wizards just shoot each other with guns?” many people on Earth wonder.When Reynard died on Earth and was reborn in a world of magic, he became nobody. He had no parents, no system, no special bloodline, and a magical aptitude that only let him advance in magic by consuming expensive materials. Materials that he could never afford!So instead, he crafted a gun.Oh, you want to cast a spell?Then I cast bullet!From the most hopeless student, Reynard turned into a feared magus. But his path to riches and power was still full of peril!“Ah… why can’t I just stop pissing off wrong people and seducing wrong girls?”

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

A perfect exercise has created a mythology academy that makes the heavens and the world tremble.

The invincible dean leads a group of teachers and students who are not afraid of the sky and earth to compose a myth together!

When hundreds of millions of years have passed and he is no longer in the world, there is one title that still makes the world tremble: Dean!

- Description from novelbuddy

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.