Two high school students become entangled in a wildly conflicting emotional relationship that erupts when they discover they are now step-brothers.

Baili Qianchuan, a struggling idol rents an apartment from Nan Bowan, a high-ranking executive, but a livestream mishap sparks rumors of their romance. Seeing an opportunity for fame, Baili Qianchuan plays along, turning their fake relationship into a viral sensation—until unexpected feelings get in the way.