I Hope to Be the Secret Benefactor of the Tyrant

I was transmigrated as the older sister of the heroine in a dark, 19+ rated novel. To make matters worse, this novel had another problem. It was a kidnapping and confinement story. "...Who dares to confine my sister? Absolutely not." I had to protect the lives of myself and my precious sister at all costs. So, I secretly became the male lead's patron. 'Let's shower him with so much money that he can't even think of bad things!' It was the Male Lead's Happiness Project. *** But the male lead refused the sponsorship. 'Instead of such shallow volunteerism, demand a direct reward?' If he feels more comfortable paying a price, then so be it. But he has nothing, so how is he going to re...