San Yue Jin Yi (三月锦衣)

In order to find his long time benefactor -- Immortal Lin Hua, to repay his debt of gratitude, the crybaby young fox demon Qi Ye worked hard in cultivating, from human's world to the Immortal's world, yet he found out the Immortal no longer remembers him?! Qi Ye feels hurt, sob sob sob... But good thing he brought with him his old dad's treasured book of courting a wife <>! Brave Foxy, isn't afraid of hardships--" Benefactor, this time I'm repaying you back my gratitude through devoting myself to you!

A mundane office worker gets thrown into a danmei novel and becomes the protagonist's cold Master. Intially, he only wanted to spend the rest of his life peacefully, but unexpectedly, it turns out that every single character has unusual feelings for this Master?! What happened to falling in love with the protagonist?!