Supernatural Bodyguard

A cup of deceitful Starbucks, let the protagonist and the young lady encounter the grandpa's fortuitous encounter.
A trace of sadness and benevolence caused the protagonist to fall into endless trouble.
In this book, the protagonist was an adept at stabbing the brain. He was speechless as he became the flower protector of the Lady Qian Jin. It was a story of becoming stronger in the face of danger.