Rule 34 Dev - 2boys 2girls bad_id bad_tumblr_id black_hair bow bowtie cenco cencoroll everyone greyscale kei_(cencoroll) kiikanna monochrome monster multiple_boys multiple_girls necktie pleated_skirt school_uniform short_hair shuu_(cencoroll) skirt tetsu_(cencoroll) yuki_(cencoroll)|2597402106