"To Do List" (내일할래) is a song by Hyolyn, a South Korean singer. The song talks about the hesitation and fear of moving on from a past relationship and starting anew. The lyrics describe the struggles of trying to forget someone and move on, but ultimately failing to do so. The chorus contains a list of things the singer wants to do, but always ends up putting off until tomorrow. The lyrics suggest that the singer is using the list as a way to distract herself from her emotions and the pain of heartbreak. The song ends with the realization that moving on is harder than anticipated, and that the singer still has a long way to go before she can completely let go of the past. Overall, "To Do List" is a heartfelt and relatable song about the hardships of trying to move on from a past relationship.