>>43323410It's considered one of Luna's signature songs but I'll give you a little more information than that
It's an old nostalgic type of song but one of its most popular forms is in this oldschool anime OP
https://www.youtube.com/watch?v=Lvf29oBytakAnd this version has really high-pitched, chipmunk voice vocals
This is probably one of the versions most people know, and of all the voices in holo that sing this song, Luna's is the closest that fits and she sings with a unique style that matches the sweet, nostalgic feeling of the song