1girl anniversary artist_name black_hair black_skirt black_thighhighs character_name chobipero convenient_leg daihannya_nagamitsu_(tenka_hyakken) dated grey_sweater hair_ornament heart horns legs nail_polish no_shoes pleated_skirt school_uniform signature skirt solo spoken_heart sweater tenka_hyakken thighhighs twintails yellow_eyes