1boy, 1girl, d, ahoge, backlighting, black_hair, black_shirt, blush, breasts, brown_eyes, cleavage, dress, heart, hetero, hiiragi_shinoa, hyakuya_yuuichirou, indoors, large_breasts, long_hair, long_sleeves, lying, off-shoulder_dress, off-shoulder_sweater, off_shoulder, on_back, owari_no_seraph, parted_lips, red_dress, red_sweater, rou_(rou22), shirt, short_hair, short_sleeves, smile, solo_focus, sweater, sweater_dress, torso_grab, window