Rule 34 Dev - 2boys 2d error_sans error_sans_(fan_character) errorink_(fan_character) errortale gay heki_(artist) humanoid ink_sans ink_sans_(fan_character) inktale male male/male male_only monochrome penetration sans sans_au sans_oc sanscest sex tagme undertale_(series) undertale_au undertale_fanfiction yaoi|5334467496