A possible concise summary is:
A man finds out that his one-night stand from three years ago is his new boss and the mother of his twin babies. He also activates a system that rewards him for being a good father. He tries to bond with his children and impress his boss, while fending off her other suitors. He plans to propose to her with an engagement ring.
Here are the key facts extracted from the text:
1. The narrator discovered that the female CEO of his company is a woman he had a one-night stand with three years ago.
2. The CEO gave birth to twins, a boy and a girl, from their encounter.
3. The CEO has been planning to make the narrator fall in love with her.
4. The narrator activated a "dad sign-in system" which seems to be a reward or point system for fathers.
5. The CEO suggested getting a marriage certificate before the Civil Affairs Bureau closed, but the narrator refused.
6. The narrator has a system in place that makes him confident about making money in the future.
7. The narrator believes it's his decision when to get a marriage certificate.
8. The twins, upon meeting the narrator, recognized him as their father.
9. The boy twin looks exactly like the narrator did as a child.
10. The girl twin looks very similar to the CEO, Yan Qingxue.
11. The narrator suddenly became a father and understands the children's initial rejection of him.
12. The narrator plans to win over his son by showing off his septwolves (likely a reference to something impressive or of value).
13. The narrator expresses affection for his children and interacts playfully with them.
Please let me know if you need more details or further assistance!