They both feature the adult fl going back in time to relive her high school days and attempts to change their futures by making different choices in the past. They both involve time jumps from the future to the past multiple times and attempts to prevent someone from dying. Lovely Runner should heal the broken heart Shining for One Thing, causes.

The two dramas have very different storyline but are similar by both having: Stable couple relationships, Supportive ML, Strong ML, Smart FL, Slowburn and minimal skinship (physical dispaly of affection).