"My Shining Day" is the first single release by the virtual idol unit "épeler" since its relaunch. This song was made by Ehara Miori and sung by three members of épeler: Yuzuha, Flare Rune, and ChumuNote.The song features the cool and beautiful electro sound of Ehara Miori and the pleasant harmony of the three members' unique voices. "My Shining Day" is a must-listen for VTuber fans and music fans alike.