strike witches, world witches series
gertrud barkhorn
kosokosomaru (higashi taishi)
1boy, 1girl, animal ears, bald, bdsm, blush, bondage, bound, clothing aside, dog ears, dog girl, hetero, lab coat, no pants, old, old man, open mouth, panties, panties aside, purple hair, restrained, sex machine, stationary restraints, tears, underwear
bad id, bad pixiv id, commentary request, photoshop (medium)