After Being Sealed for Ten Thousand Years, I Became the Strongest Nanny

This book is also known as Yun Wanjia's Alchemy Workshop: The Incredible Nameless Golden Pill

A light yuri story

After the seal of ten thousand years came to an end,

The legendary Demon Lord Shang Yan, who once brought the whole world to the brink of destruction, found a young girl who looked like his beloved senior sister. She was praying fervently and calling him, "Dad?"

Burdened by guilt toward his senior sister, Shang Yan began helping the girl rebuild her alchemy workshop.

The story is a laid-back slice of life, with the occasional bit of showing off.