Programmer Chi Yanbai discovers that his younger sister, a freshman in college, spent eighty-seven thousand in eighteen days using the family supplementary credit card he provided to chase stars. Instead of harsh accusations, he starts a thirty-day debut experiment, dissects fan consumption logic with data analysis, guides the public toward rational star-chasing with personal practice, and promotes the addition of rational consumption reminders in idol live-streaming rooms. Ultimately, his sister comes to her senses and learns rational consumption, while Chi Yanbai declines massive commercial offers to return to his primary job, protecting family affection with rationality and responsibility, and conveying the positive value of rational consumption.