Both dramas are about the FL traveling back in time due to an object (comic book vs. phone), attending school, and forming a relationship with/trying to save the ML who is missing/presumed dead in her present time.
Both are short dramas with the same actor as the ML, playing a very similar character. While one has fantasy elements and the other doesn't, both are set in school, and both FLs are chasing the ML for a long before before he reciprocates.
