idolmaster, idolmaster (classic), idolmaster 1
futami ami, futami mami
tadano akira
2girls, all fours, animal ears, breasts, brown eyes, brown hair, cat ears, covered nipples, flipped hair, loli, multiple girls, one-piece swimsuit, school swimsuit, siblings, sisters, small breasts, swimsuit, thighhighs, twins, white one-piece swimsuit