Rule 34 Dev - 2010s 2018 2boys 2d alternate_universe animated_skeleton artist_name bent_over bent_over_table blush drool drooling hand_on_head hand_on_hip heki_(artist) heterochromia humanoid male_only sans sans_au skeleton solo_focus tears tongue tongue_out undertale undertale_(series) undertale_au undertale_fanfiction unseen_male_face|6802541016