Baka to Test to Shoukanjuu‎ - Volume 7.5, Special Bulletin-Brainy Specs Advisory Session Part II

As a walk-on, he had been the mistress of his sugar daddy for three year. However, they only had met each other for a few times.
As a boss, his sugar daddy had tons of lovers.
The walk-on: The cake shop is the only thing I love in this world. Lovers? Never want one.
The boss: No problem. Nobody wants that.
Then, they fell in love with each other…
Shameless playboy x heartless rogue
1v1, this is not a decent love novel.

- Description from Novelupdates

This is a century glittering with the brilliance of human civilization, a world where steam engines, magic, and demi-humans coexist, a chapter of complaints committed due to exploration.'Red Dragon Queen rises first, annihilating all human affairs with her wrathful flames.''The mysterious child of the sea will raise great waves to erase the sins of humanity.''The god of the skies will leave no refuge for the remnants, nowhere to belong.''The immortal witch composes epitaphs for them with her magic.''And I, will write a new chapter for this world'... ...... ...Years later, Fisher, who has received the apocalyptic prophecy and the miraculous tool called the Demi-Human Girls' Completion Manual, wishes to be recognized as a pioneer in demi-human academia, a savior of human civilization, a dove of peace, and a messiah.Instead of being the person who is torn apart with the firewood knife, and the savior divided into pieces.

Red-Outlaw follows the story of Yokais that are in the Race to become the next King as the Late king died. The story folds many deep mysterious, arcs and Adventure of Yokais and who will become the next Yokai King.

Kaito was summoned as a hero... and discarded as trash.No magic. No blessings. Just intelligence and a mysterious deck of cards that summon legendary villainesses—women so dangerous the gods themselves sealed them away.Now, with three (soon four) villain queens at his side, Kaito will build a kingdom from the ashes of his humiliation. Not through strength, but through strategy. Not through destiny, but through choice.But every summoned queen has her own agenda. Every ally hides secrets. And the kingdom that abandoned him? They're coming with armies.[WARNING: R-18 | Explicit content, graphic violence, and adult scenes]→ Anti-Hero MC (Strategic, Morally Gray, No Beta Behavior)→ Four Villain Queens (Competitive Harem, Slow Burn)→ Kingdom Building (Economic, Military, Political)→ Tactical Warfare (Army Battles, No Plot Armor)→ Ancient Technology + Magic Coexistence→ Character Development (MC & Queens Evolve)→ No NTR | No Dumb Decisions | No Forced Drama