Commentary: “This song extracts the parts of life where you think and struggle over how you should be, how you act, the choices you make, and so on. It captures the struggle with the two sides of oneself. We titled it ‘Solotrip,’ comparing the endless time spent with yourself (solo), which continues until the day you die, to a trip.” (Billyrrom) Billyrrom, who have been working together with us as a team, decided on all the direction through close communication. The line at the beginning of the MV, “Can I continue to make solid choices on the road that leads the end?”, was created and inserted through Mamiya’s interpretation and suggestion.