In the first book, the heroine was playing by the river with her best friend when she was a child. She accidentally fell into the water and was rescued by the hero. Many years later, the heroine is a salesperson in a valve factory, and her best friend is a nurse. The male protagonist is the date of his best friend.
Listen to me, this book must be written! The protagonist is jobless, lovelorn and miserable, but unexpectedly unlocks a god-level system and directly counterattacks to become an old street gangster, which is great.