Stellar Train: I Open a Small Shop on the Train - Chapter 120

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Anger. Pain. Desolation.

Ling JingXuan, a secret international doctor and killer. Can save people with one hand and kill with the other. Right or wrong, both paths without exception would cause people to be terror stricken. One morning he crossed over, with only four bare walls for a home and was also given two free stir fried little buns. Ling Jingxuan can’t help but be speechless.This life, can this pit be any bigger?

Yan Chengrui, Qing dynasty’s only prince with a title of General. On his first mishap on a mission, a good man forcibly became a slave wife. There was no one who was not disappointed from the imperial family. But, don’t know when slave wife learned it but poison concubine’s poison was incomparable, who dares to try to straighten him out?

“What? 30 Wen? You’re robbing from people, so expensive!”

One day of the month of a certain year, Ling Jingxuan takes the two little buns to the market to buy living necessities.These five year old little buns after hearing the price have to hold back their red faces. Fried little hands rigidly held onto the broken wallet, Ling Jingxuan suddenly wanted to cry but had no tears. Sons, we earned money but not spending it, don’t tell me its left for the foals?

At the end, it was obvious they carried two liang of silver. Stuff that was sold at the last minute were the cheapest. Seeing the smile of satisfaction from the little fried buns, Ling Jingxuan secretly vowed. One day he would develop them into super meat buns，a rich 2nd generation family!

- Description from Novelupdates

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.