MTL - Those Who Abused Me Cried and Begged For My Forgiveness - Chapter 25 you are just her brother

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Zhuge Lan brought the [Emotion Value System] and made a great name for himself in Douluo!Because his soul skills are too strange, he knelt down and cried when he was banned.100% of the time, his sword was caught with bare hands: Kneel down, you little jerk!The Eye of the Sage: Whoever you stare at will get pregnant and give birth in one hour!Hateful Curse: If you hit me, you will have diarrhea, and if you hit me again, you will have dysmenorrhea!......Tang San: Kneel down first when you meet him, and you will have dysmenorrhea if you hit him! Is this person poisonous?!Tang Hao: I punched him to vent my anger on my son, and he had diarrhea so much that he couldn't raise his head for the rest of his life!Zhu Zhuqing: Lan is so handsome, I don't understand why you are afraid?Qian Renxue: You have seen my true female form for a long time, and you are still arm in arm with me?

【Explosive New Book】 At Thunder Sound Hall, the Great Saint fell! With the Life and Death God Talisman, he reversed time and space; the Monkey King, unyielding, returned against the heavens! All gods and Buddhas lost their colors, my fate is determined by me, not by the heavens! In this life, I, Old Sun, will make all the gods and Buddhas remember this name— I am, the Great Sage Equalling Heaven, Sun Wu Kong

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.