Zhou Yan and Lu Lin have been estranged since they were high school classmates. One retreated due to self-doubt, and the other became estranged due to the bitterness of a secret love. After experiencing injuries, misunderstandings and tears, he finally confessed his two-way secret love that had been hidden for many years on the rainy night of graduation. From then on, he took up his pen and joined the army to guard the borders. He studied the stars and inquired about the universe. On completely different paths, he became an irreplaceable coordinate in each other's lives.
Zhou Yan: A pure heart. He is as enthusiastic and cheerful about the world as the scorching sun, but only in front of Lu Lin, this sincerity will turn into cautious clumsiness and solemnity.
Lu Lin: Double-sided mirror. He is as alienated from the world's rationality as a precision instrument, but it is only towards Zhou Yan that he reveals all his emotional dark side and obsession.
