kirino kasumu, mozilla firefox, mozilla thunderbird, os-tan, 2girls, :d, animal ears, back-to-back, bare shoulders, bikini, bikini bottom only, blonde hair, blue eyes, brown eyes, cleavage cutout, clothing cutout, detached sleeves, dress, fox ears, hand on headphones, hand on own ear, happy, headphones, long hair, midriff, multiple girls, navel, open mouth, orange eyes, personification, short hair, simple background, smile, swimsuit, white hair