diamond (houseki no kuni), houseki no kuni, artist request, lowres, official art, 1other, between legs, black jacket, black necktie, black shorts, chibi, chibi only, full body, gem uniform (houseki no kuni), hand between legs, iridescent, jacket, looking at viewer, necktie, open mouth, other focus, puffy short sleeves, puffy sleeves, short hair, short shorts, short sleeves, shorts, sitting, solo, thighhighs, wariza, white thighhighs