The author says:
Just a brainless, fluffy short story written between work and school ~
The age gap is 14 years, Doctor Yan is 32.
Summary by translator:
On his 18th birthday, a little boy’s friends hold a party for him at a bar. There, he gets the number of a certain Doctor Yan, who, unfortunately, refuses to respond to the little one’s texts and calls.
But fate brings them together when Doctor Yan’s mother asks him to look after her best friend’s son.