nanashisanhvbn, amaya tsubame, juo sena, gakuen idolmaster, idolmaster, commentary, highres, 2girls, between breasts, blush, breasts, breath, closed eyes, collared shirt, grabbing another's breast, grabbing from behind, greyscale, groping, long hair, monochrome, multiple girls, necktie, necktie between breasts, open mouth, pantyhose, pleated skirt, ponytail, school uniform, shirt, sitting, sitting on lap, sitting on person, skirt, speech bubble, sweat, yuri