Rule 34 Dev - 1boy anal anal_sex artist_request collarbone fate/zero fate_(series) handjob human kneeling leg_grab male male_only moaning monochrome navel neck nude open_mouth pink_background rape ryuunosuke_uryuu sex short_hair spot_color tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles tentacles_on_male type-moon wrist_grab|1522103376