A memorable debut song for MITTSU and his first produced song. This is a thank-you song for those who have taken care of you, and a graduation/support song to encourage your starting a new journey to a new place. The lyrics were written by MITTSU himself, and he put his gratitude to his seniors into every word of the song. "When you are down, smile! If you smile, the light will shine through!" The lyrics of the song are filled with this encouragement.