Skeleton Knight, in Another World - Chapter 2Volume 1 -

The tale of Oliver.
An orphan boy from a Mine, in 19th century Europe, filled with Magic.

Jiang Xichu was Chen Man’s secretary for many years. There was an inevitable dispute in the workplace. On this day, she just had a big fight with Chen Man. Before she passed away, she was stabbed to death by a psychopath who retaliated against society. Not long after her death, Jiang Xichu learned from the civil servants of the underworld that Chen Man didn’t feel guilty and had embezzled her well-deserved salary. Even her funeral was held casually, her colleagues weren’t able to attend and give their condolences. She goes back into the world full of anger and was ready to frighten the heartless woman, Chen Man. When she arrived at Chen Man’s bedroom, she saw Chen Man held an urn full of her ashes, while slowly looking at her pictures when she was alive while looking haggard.

A year later, Chen Man also died. The cause of death: suicide caused by severe depression. Jiang Xichu left Chen Man’s home with a complicated mood. She wanted to go back to the underworld and ask Chen Man about it. However, after stepping out of the home, she was reborn again.

Once again in the world, general manager Chen made her breathless.

Jiang Xichu: …

You little actress girl, you play your two faces very smoothly!

- Description from Novelupdates

5 years after the world changed, the final boss appeared.

The top five players in the world, including Specter Seo Jun-ho, finally defeated the Frost Queen…

But they fell into a deep slumber.

25 years passed.

“A second floor? It didn’t end when the Frost Queen died?

Specter awakes from his slumber.

You take up a student career.

Student career upgrade to lv.7

Acquired skills: primary school knowledge, junior high school knowledge, high school knowledge.

You take the college entrance examination,

You got a perfect score.

Your basic occupation has been upgraded to lv.9, and the job transfer system has been activated.

You change jobs to become a scientist, you gain R&D skills

You use research and development skills to get space fortress construction technology

You use R&D skills to gain starship technology.

You are invincible.

- Description from novelbuddy