kouyama rin, futsuu no keion-bu, commentary request, 1girl, animal costume, animal hood, bass guitar, cosplay, from side, greyscale, guitar strap, gyogyo kasien, hand up, holding, holding bass guitar, holding instrument, hood, hood up, inset border, instrument, kigurumi, long sleeves, looking at viewer, monochrome, official alternate costume, outside border, profile, snake, snake costume, solo, tongue, tongue out, twitter username