1girl, ahoge, bangs, blush, closed_mouth, comic, dress, envelope, flower, genderswap, genderswap_(mtf), greyscale, hair_between_eyes, hands_up, heart, holding, holding_envelope, long_hair, looking_at_viewer, love_letter, monochrome, pleated_dress, short_sleeves, skirt, smile, solo, very_long_hair