Han Yiyun has been deeply in love with Qi Siyu since he was a child and has been silently caring about this little sister. After saving Qi Siyu in an accidental fight, he finally revealed his feelings. Qi Siyu also fell in love with him during this incident. So the two started a Saturday romance (Qi Siyu was in his senior year of high school and only had a half-day off on Saturdays). However, misfortune struck... In order to let his beloved girl successfully enter college, he weaved a beautiful lie... When everything was revealed...