I Became the Tyrant of a Defense Game - Chapter 18

One of the seven strongest people on the continent, the King of Mercenaries. He started a war to avenge his fallen family and destroyed territory but failed and lost his life. However… “Wow, I’m alive?” I returned to the past, back through time. A perfect opportunity to right my regrets and reverse everything. It doesn’t matter if people around me point fingers, calling me a scoundrel, or dismiss me as tr*sh. Because… “I’ve got a plan.” “What plan?” “A plan to destroy everything.” There won’t be a second failure. This time, I’ll wipe out all my enemies. …But first, I need to rebuild this damn estate.

Wen Xuan, the chief disciple of Shui Yunzong, respected the teacher halfway and loved his fellow students, was a model among his disciples.
    He had thought he would spend his life like this.
    Until one day, he met an open younger brother.
    His brother told him that this world is actually a text.
    And he, as the ugliest and humble negative character in the text of the upgrading and upgrading, will be bumpy in the second half of life, departed from relatives, and desolate.
    .
    “Too many people have talked about your life in scornful sarcasm after tea. No one knows how you spent those years and no one sees how you hold onto the bottom line in the lonely struggle. No one cares about the suffering you have experienced and your persistence. But I have seen it and I know that I care. ”

    “So I came to this world and became your dependency.”

- Description from Fpzw

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.

She was forced by her husband and his mistress to jump into the sea and commit suicide, only to be rescued and taken care of by the jerk's uncle for seven years.