art by doppel, 1boy, against glass, ahoge, arched back, bad id, bad pixiv id, blonde hair, blue eyes, blush, detached sleeves, glass, half-closed eyes, headset, heart, kagamine len, male focus, naughty face, necktie, open mouth, pocket, puffy short sleeves, puffy sleeves, sailor collar, short sleeves, shorts, solo, spoken heart, tongue, tongue out, vocaloid