Just Started College, and the System Grants Cashback on Spending from the Start

[Multiple heroines + feel-good fiction + gentle senior student + tsundere heiress] Just after starting university, he awakens a System that lets him draw a prize once every three days. From his very first draw, he gets a spending cashback reward. In that case, he'll just shop, shop, shop! A gentle senior student and the haughty campus beauty both begin to fall for him. Bai Yu has a woman on each arm and launches straight into the most exhilarating, peak campus life imaginable.