The song is called tettey teretty and yes its a vocaloid with rin, len, yukari, miku, Kaito, Luka.
I dare these people to watch this without breaks
GlassWolf102
GlassWolf102
GlassWolf102
elliedoglover
silverstein663
Waterdude77
ThotPatrolChief
hi_im_Frisk
vocaloid-forever
Kagamine-Rin
Miku-Hatsune
Kagamine-Lover
-Luka-Megurine-
--Kaito--
