Reborn to prepare for the college entrance exam, you're letting me retire and make a comeback?

Reborn at eighteen, just before the college entrance exam, Lu Qian is mistakenly flagged as an eighty-year-old by a system and forcibly bound to the "Retirement and Reversal System." His immediate reaction? Pure panic—he needs help, and fast. Before the binding, he was the undisputed badminton ace of his school. Afterward? He's reduced to an old-timer hobbling through the park, getting thoroughly outplayed by actual seniors twice his age. Yet somehow, he's never alone: his devoted childhood sweetheart sticks by his side without fail, the cool and striking captain of the women's basketball team casts her gaze his way, and the breathtaking campus beauty from Fujian Normal University enters the picture as well. Then, to his utter bewilderment, they all offer to take care of him in his "golden years." System: Lu Qian: "???" Retirement and reversal at eighteen—are you kidding me?!