Tate no Yuusha no Nariagari - The Valentines of the Shield Hero 1

A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life. This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students.

In the age of the Great Liang Dynasty, the lives of the people were made convenient with steam-powered machines that run on a fuel named Violetstream Gold. Chang Geng, who lived in a small countryside village, shared a distant relationship with his mother while his stepfather was away most of the year round, and the only people he was close to were two little kids, the village teacher, and his yi fu – adoptive father. But his life was flipped upside down one day following the barbaric Man tribes’ invasion, and it turned out that his entire identity had been an illusion – not only was Chang Geng himself not the country boy he thought he was, but also his mother, his teacher, and even his beloved yi fu…

- Description from Novelupdates

[First monster slain. Special rune obtained. Level 2 has been reached.]

Li Hao: What? Someone jailbreak? Huh? Why is there an exclamation mark on the reward notice?

[Click on this reward notice to get the location information of the jailbreaker~]

Li Hao: There is an exclamation mark on this scratch pad?

[Scratch this card and you will win a prize, don’t miss it~]

Li Hao: There is actually a question mark on this box of pills?

[This is a box of life-saving pills, which can save the life of an old man. The host can receive the task and go to a fixed location… and you will get an unexpected surprise~ Do you want to receive the task? Yes! no! 】

Li Hao: Can you still receive the mission? Eh…that person also has an exclamation point? Huh? This dog actually has hints~

[Ding dong, congratulations to the host, for completing the task, you will be rewarded with a villa worth tens of millions…]

[Ding dong, congratulations to the host, complete the task, reward a Bugatti Veyron…]

- Description from novelbuddy