"Heartwarming" is a cheerful and optimistic instrumental piece composed by Kevin MacLeod, a prolific composer known for his royalty-free music widely used in online videos, podcasts, and independent projects. While its exact origin date is unclear, its style is characteristic of positive, corporate-friendly background music from the 2000s-2010s. The track's mention in relation to "Megalo Box OST" suggests it was also used in the popular anime series Megalo Box, contributing to its recognizability.