On a rainy night a few years ago, Molly, the owner of a bar, took in Hong'er, who had lost his memory.
Although he had no memories of the past, he thought that it didn't matter because he had Molly's company.
Life was happy now; even without the past, he could live a quiet life as Molly's adopted son.
--That was what Hong'er really thought until the man named Bowen came into his life.
His entanglement with Bowen, his growing acceptance of him, and the accidental revelation revealed by a mistake made in heat, everything was tied together to his past.

"Who are you? And who am I?"

A series of mysteries ensued. A mysterious bandit in the royal capital, an informer in the lower town, a nobleman's crime that could not be seen--
"--Ah, it's so sad. What will it take for you to believe me?"
"--Until you're willing to die for me."
"--Oh, that's all right, dear. If you are in danger one day, I will die for you.”

[From Steam]