kasuga mirai, idolmaster, idolmaster million live!, idolmaster million live! theater days, commentary request, game cg, official art, third-party source, 4girls, black tank top, braid, brown eyes, brown hair, character name, collarbone, cuffs, hair ornament, hairclip, handcuffs, height chart, holding, holding sign, indoors, jewelry, looking at viewer, mugshot, multiple girls, necklace, official alternate hairstyle, open mouth, short hair, sign, solo focus, straight-on, sweatband, tank top, tongue, tongue out, upper body, wristband