2girls, black_sailor_collar, black_skirt, blue_hair, blush, classroom, closed_eyes, curtains, desk, imminent_kiss, incest, indoors, kotonoha_akane, kotonoha_aoi, long_hair, multiple_girls, neckerchief, one_side_up, open_mouth, pink_hair, pleated_skirt, purple_neckerchief, sailor_collar, school_desk, school_uniform, serafuku, short_sleeves, siblings, sidelocks, sisters, skirt, smile, socks, voiceroid, white_socks, window, yamamomo_(plank), yuri