kurono yuu, original, bad id, bad pixiv id, 2girls, black hair, black serafuku, blood, bottomless, boxcutter, brown hair, cutting, eye contact, kneehighs, knife, long hair, looking at another, multiple girls, nail polish, navel, no pants, panties, school uniform, self-harm, serafuku, short hair, skirt, socks, striped clothes, striped panties, thighhighs, underwear, yellow eyes, yuri, zettai ryouiki