MTL - The Kryptonian of a Certain American Comic - Chapter 70 69. Ancient One Appears (Second Watch Subscription!)

An unnamed 34-year-old Japanese NEET is evicted from his home following his parents' death.

Upon some self-introspection, he concludes that his life was ultimately pointless.

Walking down a street he intercepts a speeding truck heading towards a group of teenagers, in an attempt to do something meaningful for once in his life he manages to pull one of them out of harm's way before getting himself in the way of the truck and dying.

Awakening in a baby's body, he realizes he has been reincarnated in a world of sword and sorcery.

He resolves to become successful in his new life, discarding his past identity for his new life as Rudeus Greyrat.

In the Great Chu Kingdom, evil spirits are everywhere.

In this world, there are warriors, Taoists and Buddhas, monsters, and weirdness.

Xu Bai came across time, the hell started, and he was in the cell of a bandit village.

When the danger came, he found that his understanding was not quite right.

[Observe the nameless knife marks on the wall, and comprehend the bone-breaking knife technique. 】

【Observe the forging book, comprehend the forging method】

[Observe the hexagram scriptures and comprehend fortune-telling. 】

When entering the bandit village, Xu Bai tied the chain with his hands, and when leaving the bandit village, Xu Bai carried the ghost knife.

“In this world, there are many things that can be seen. I just know how to observe better than you.” Xu Bai laughed.

- Description from novelbuddy

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.