Vigloo

In his previous life, he was a world-renowned scientific genius who died of a heart attack, and was reborn as a young student named Zhang Han. Born into poverty with parents who died when he was young, he was raised by his grandmother. Determined to change their fate, he starts with the college entrance exam and, as a prodigy, sets out to change the world with his science and technology.

I Mok-sin，Jang Geum