MTL - System Supplier - Chapter 1410 "Academic Achievements" of Master Langley

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

When The Cute Kunoichis Spied on Their Teacher's Secret is a light novel written by Kazuma Kamachi and illustrated by Ryuushi Tajima.

The story takes place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use Strategic Martial Arts, techniques that combine cutting-edge modern technology with a traditional foundation of martial arts and ninjutsu. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission. Souha's four students are all kunoichi who have all gained the rank of Elite Ninja, the highest official rank available to ninja. However, one day two Shogunate ninja approach him with the news that his four students have gone rogue and have stolen a portable modular nuclear reactor, and thus they ask for his help in bringing his students to justice.

Three centuries ago, reality tore open and parasites from another dimension poured through. They didn't just kill humanity—they consumed it, wearing human faces while spreading like a plague through every major city.The strong became Originals, commanding lesser generations in a hierarchy of monsters that humanity calls Bloodsuckers.Now they own everything. Governments, corporations, entire cities bow to creatures that should be myths.That's when the Shadowguard was born. They were humanity's elite hunters equiped with the skills and tools to put an end to the bloodsuckers. But they became nothing more than political tools, protecting the wealthy while the poor got harvested by Bloodsuckers like cattle.Kaine Cross was one of the best hunters alive until he walked away from the corruption. He decided to become a solo hunter.Unfortunately, going freelance got him killed by the very monsters he'd spent twelve years learning to destroy.Death was supposed to be final. Instead, Kaine awakens in an ancient tomb with a system that makes him something the bloodsuckers have never faced—a predator that grows stronger with every kill, commands armies of the dead, and turns their own kind against them.Every kill feeds his strength. Every corpse becomes a loyal soldier. Every battle expands his growing army until even vampire lords will bow or join his ranks permanently.[LEGENDARY WEAPON ACQUIRED: SOUL END - THE DEATH REAPER][SKILL UNLOCKED: CORPSE DOMINATION - UNLIMITED ARMY CAPACITY][MORTAL ESSENCE SYSTEM: ABSORB POWER FROM EVERY KILL]Zombies. Liches. Reapers. Wights. Revenants. And even monster girls; beautiful, deadly creatures once enslaved by the vampires now serve at his side, bound by Kaine’s will or by lust, vengeance, and freedom.He's not a hero. Heroes save people. Kaine Cross collects enemies and turns them into allies, whether they want to be or not.The vampires ruled through fear for centuries. Now they're about to learn what happens when death itself holds a grudge.Join Kaine as he builds an unstoppable army of undead and monster girls, and leads them on a path of blood-soaked revenge.Build an army. Claim your revenge. Rule the dead.

My memories of my past life returned when I hit my head on a rock. I am Katarina Claes, the eight-year-old daughter of a Duke. While I was struggling with a high fever, it was decided that I would become a prince’s fiancée. I have now realized that this is the world of an otome game I played in my previous life.

I also realized that I had become the villainous noble girl who got in the way of the protagonist and her capture target… if the protagonist got a good ending, I would be exiled from the country with only the clothes on my back, while in the bad ending, I would be killed by the capture target… where’s my good ending!? Do I only get bad endings!?

I want to overcome all the destruction flags somehow and reach old age!