1girl, buttons, collared shirt, cosplay, diamond button, flandre scarlet, frilled sleeves, frills, green skirt, heart, heart of string, komeiji koishi, komeiji koishi (cosplay), long sleeves, medium hair, one-hour drawing challenge, one eye closed, open mouth, red eyes, ruu (tksymkw), shirt, side ponytail, skirt, solo, third eye, touhou, wide sleeves, yellow shirt