I opened a shop on the Astral Train - Chapter 65

In the spring of year 6823 of the New Calendar, Lu Xuan, an unregistered resident of the Federation, hid outside a high school classroom and secretly learned a Cultivation Skill, embarking on the path of Cultivation.On the same day, he returned home and had a dream, just as he always did. In the dream, he was in the Guardian Storage Room during the Spring and Autumn Period in Chinese history（770-481 BCE）, and the current Keeper of the Records was named Li Er, also known as Laozi.Later, Lu Xuan dreamed that he became the succeeding Keeper of the Records, became Confucius's second teacher, became the senior brother of Zhang Daoling, the Ancestral Celestial Master, and became the honorary father of the First Emperor...Even later, someone unearthed a roll of bamboo slips from the ground, on which an event was recorded.[The eighteenth Keeper of the Records, Lu Xuan, his Sword Qi like a waterfall, assassinated Duke Huan of Qi in his bedchamber]

Okay, so I know I applied to become a caretaker, but I didn't sign up for having to experience all these crazy things! I'm just a simple guy!

Descent of the Phoenix – 13 Years Old Princess Consort

The strongest female assassin from a special assassination force met her death one day on a mission. To her surprise, she woke up in the body of a 13 year old girl, Mu Rong Liu Yue. Through Liu Yue’s past memories, she found out that she was bullied due to the huge birthmark on her face, even though she came from a renowned family. Liu Yue was beaten to death by her own cousin, and that’s how she managed to enter Liu Yue’s battered body. The assassin then decided to live her life as Liu Yue and swore to avenge her death.

- Description from Novelupdates