Where Did I Get Such a Big Son?

Su Yang wakes up to chaos: a gorgeous four-year-old is standing in his living room, calling him 'Dad.' The real bombshell? The kid claims his other father is Gu Yan—Su Yang's sworn enemy and the last person he'd ever sleep with. Impossible. Ridiculous. Except the boy has Su Yang's mischievous grin and Gu Yan's piercing eyes. As panic spirals and the future unravels, Su Yang must face an absurd question: how did he and his worst rival end up co-parenting a time-traveling child?