- Both dramas have lovers-separated theme and mature romance in urban setting.
- FL broke up with ML first.
- FL hid the fact that she was still in love from ML.
- ML was devastated because of the separation. He then lived in misery, suffering from prolonged pining and developing mental issue, unable to give up on their love.
- ML took the initiative to get back with FL, but was rejected again.

- Same leads. Reversed suffering.
- BoL can be considered the reincarnation of TLTSILY, where ML get his retribution for betraying the FL in the past life.

FL broke up with ML and went on suffering on her own before meeting again. ML was kept in the dark about the breakup and was heartbroken for years, resulting in his resentment towards FL. Both dramas begin with their lives several years after the breakup.

- ML and FL fell in love during high school
- FL didn't want to be a burden and broke up with ML due to life obstacles
- FL has financial problem while ML is devastated/has psychological problem.
- They meet again several years later, but the past misunderstanding prevents them from reconciling.