Arcane Academy: The Divine Extraction Legacy - Chapter 801 Waited

When a fantasy kingdom needs heroes, they skip the high schoolers and summon hardened Delta Force operators.Lieutenant Cole Mercer and his team are no strangers to sacrifice. After all, what are four men compared to millions of lives saved from a nuclear disaster? But as they make their last stand against insurgents, they’re unexpectedly pulled into another world—one on the brink of a demonic incursion.Thrust into Tenria's realm of magic and steam engines, Cole discovers a power beyond anything he'd imagined: magic—a way to finally win without sacrifice, a power fantasy made real by ancient mana and perfected by modern science.But his new world might not be so different from the old one, and the stakes remain the same: there are people who depend on him more than ever; people he might not be able to save. Cole and his team are but men, facing unimaginable odds. Even so, they may yet prove history's truth: that, at their core, the greatest heroes are always just human.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

Arriving in a new world where the steam industry was booming, he inherited a three-story apartment on the capital’s royal square, took in someone else’s cat, and listened to the whispers at his ear, ready to witness this mysterious and bizarre era. The epic of the Sixth Era was about to commence, and behind the curtain, The Chosen One was destined to step into legend. Old Gods, Relics, steam, witches, detectives, ancient secrets, the Era’s brilliance... “Would you like to play a round of Roder Cards?” Time engraved the hours, as Silvermoon illuminated the shadows. I compose your legend, you whisper your verses to me.

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.