Uploaded November 2013 | Updated September 2026, 5 hours ago

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Ahh, I love Hachi...
So this song is "Donut Hole" (ドーナツホール / Dōnatsu Hōru) by Hachi and sung by GUMI. I combined it with Soraru's cover of the song, and I'd say they actually sound pretty good together.
Links to both versions here:
GUMI (w/ translation): youtube.com/watch?v=YqeWsLCwFkM
Soraru (w/... Spanish lyrics): youtube.com/watch?v=sRVygthMAA4
Link to image: pixiv.net/member_illust.php?mode=medium&illust_id=39538074