Monster Factory - Chapter 4: Monster factory

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.

I lived for you in the last lifetime, everything I did was for you, yet you wanted me to die; so, this time, life is mine to live! This world lied to me, betrayed me, and humiliated me, and I am back to change everything!

- Description from Novelupdates

One minute, I was a medical doctor rushing to work. The next, I woke up as a lowly omega inside the pages of my favorite werewolf novel The Psycho Alpha.Alpha Zachary Black. The cruel, ruthless, dangerously sexy Alpha of the Redwood Pack. The same man who kills anyone who breathes wrong around him. Especially women.He hates them. Despises weakness. And he definitely doesn’t believe in love. And he chose me as his personal omega. But there’s something wrong with me. I can hear his thoughts. Not just random thoughts. Dirty thoughts. Dark, possessive, obsessive ones about me. His so-called “personal omega.”He thinks I’m weak, fragile, breakable… but he also wants to ruin me, claim me, devour me. Every time he looks at me, his inner voice screams things his lips would never dare say out loud.I should be afraid of him. I should run far, far away. But how do you escape someone who owns your body and now, wants your soul?Worse, he’s starting to suspect I’m not who I say I am. Because I’m not just Christy, the omega. I’m a stranger in this world, trying to survive a plot I already know ends in blood.