Became a Failed Experimental Subject - Chapter 12: It’s Beef

MC (female protagonist) dies in a plane crash and wakes up in the body of a beautiful but corrupt and lascivious prime minister in ancient times, Zhang Qinglian. As circumstances decree, he (she) cannot reveal that the original owner’s soul is gone else calamity might occur. So he (she) decides to walk a righteous path, determined to help the lovely but simple little emperor rule the country. Not backing down after facing torture, not losing courage, destroying rebellions and facing off with scheming princes.

- Description from Novelupdates

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

To care for her ailing sweetheart, college student Lu Chenchen gave up her white-collar office job and chose the higher-paying caretaker profession instead. Going around in circles, she ended up at the Mao family’s home.

The Mao family background was complicated. Old Madam Mao was not her son Yanning’s birth mom, but his young aunt. His wife was Old Madam Mao’s first love’s daughter, spoiled and pampered. Despite over ten years of marriage, husband and wife were distant.

To repay Old Madam Mao’s kindness in raising him, and for the sake of his three children, Mao Yanning endured again and again – not just a loveless but outright destructive marriage.

Lu Chenchen walked on eggshells among these people – carefully serving young and old, currying favor with the lady of the house without offending the man of the house, while also worrying about his sweetheart’s illness and missing “his” elders and children back home. Her heart was like a cookie flattened between the pages of life, living a difficult and cautious existence.

However, as the saying goes, “You reap what you sow.” A life that has been polished will eventually shine with a brilliance that ordinary years cannot compare.

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.