koshigaya tatsumi, ikazuchi (kancolle), kantai collection, 1girl, anchor, ass, back, black sailor collar, black skirt, black thighhighs, blush, brown eyes, brown hair, character name, fang, hair ornament, hairclip, long sleeves, looking at viewer, looking back, music, open mouth, panties, pleated skirt, sailor collar, school uniform, serafuku, short hair, singing, skirt, sleeves rolled up, smile, thighhighs, underwear, white panties