Sis, Don't Do This! I Really Can't Spend All This Black Card Money

My name is Lin Yu. My adoptive parents treated me well, but at school, I was a nobody everyone could ignore. Until one day, a convoy of more than a dozen black Rolls-Royces blocked the school gates. A middle-aged couple with an overwhelming presence rushed over and hugged me, crying, “Son, we’ve been looking for you for seventeen years...” I was taken straight home. The mansion was absurdly huge, the garage packed with luxury cars I’d never seen before, and I could swipe a black card without a second thought. My biological parents, who had just found me, spoiled me rotten. Even more unbelievable, between both families I had more than a dozen older sisters: each one more beautiful, more fiercely protective, and more flirtatious than the last. They said, “We’re just your sisters.” But with all that cuddling and carrying me around... Sisters, are you serious? Those people at school who looked down on me don’t even deserve to polish my shoes now. Oh, and a “Tycoon System” has bonded with me, making me richer the more money I spend. So my only worries now are: What do I do with all this money I can’t spend? And what do I do about my sisters spoiling me so much? I really just want to be an ordinary rich kid!