caffein, akita neru, hachune miku, hatsune miku, kagamine len, kagamine rin, kaito (vocaloid), kasane teto, meiko (vocaloid), yowane haku, utau, vocaloid, 2boys, 6+girls, ahoge, aqua hair, bad anatomy, blonde hair, brother and sister, crossover, drill hair, everyone, formal clothes, long hair, multiple boys, multiple girls, poorly drawn, siblings, skirt, skirt suit, suit, twin drills, twins, twintails