miyao miya, tenkuubashi tomoka, tokugawa matsuri, idolmaster, idolmaster million live!, idolmaster million live! theater days, commentary request, game cg, official art, third-party source, 3girls, bathing, blush, breasts, brown eyes, brown hair, closed eyes, collarbone, crescent moon, green hair, hair bun, looking at another, moon, multiple girls, naked towel, night, onsen, open mouth, outdoors, same-sex bathing, shared bathing, single hair bun, sitting, smile, teeth, towel, towel on head, upper teeth only, water, wet