Rule 34 Dev - 2boys ass_grab blush butt_crack embarrassed gay grin groping groping_ass japanese_text kengan_(series) kengan_ashura kure_raian male male_only monochrome mullet muscular muscular_back muscular_male pixiv_id_10482186 rihito surprised sweat swimming_trunks swimsuit swimwear water yaoi|13426013336