Ichiban Ushiro no Daimaou - Volume 2, Chapter 2 — Who is that Girl?

During the day, she was his secretary, working very hard with excellent abilities. At night, she was his bedmate, trying her best to please him, and the two of them were very harmonious in bed. One day, this relationship was on the verge of ending. However, both of them had already become deeply involved and had grown accustomed to each other's presence, falling in love with each other. So...

Shen Huai was abandoned by his artists, and took over one who no one was optimistic about net black newcomer Ye Cang.
Ye Cang caught fire all over the country. Everyone else thinks it’s Shen Huai tune. Only Shen Huai knows. His artist is a superstar reborn. Later, Shen Huai gathered again-“the legendary film queen of the period of the Republic of China,” the unsurpassed Golden supporting role in the History of the Republic of China, “the Queen of Love songs popular all over the country in the Last Century,” and “the greatest superstar in a hundred years.” he breathed a sigh of relief: I don’t have to go back and inherit tens of billions of dollars

- Description from Novelupdates

As a corporate drone, Ashu was transported to another world, hoping to live a life free from societal pressures.However, he quickly found that even marrying a village girl would cost him half of his wealth!Fortunately, just when things were looking grim, his childhood sweetheart—who had trained for many years—arrived to fulfill their childhood marriage pact. Not only that, Ashu activated the Crit Refund System, which allowed him to earn rewards by binding with beings rated over 90 points![Binding with the Witch Childhood Sweetheart, 10x Refund on Magic Potion, Host Gains: Forbidden Water (S)][Binding with the Forest Elf, 10x Refund, Host Gains: Infinite Stamina and Infinite Recovery][Binding with the Demon Huntress Nun, 20x Refund, Host Gains: Demon Slayer Holy Crossbow (SS)][Binding with the Imperial Princess, 100x Refund, Host Gains: Sigh of the Heavenly Father Spear (SSS)]Ashu: “The refund multiplier increases as our relationship grows? I’ll definitely have to dive deeper into this!”