You woke up another morning and, after greeting one of the maids, were heading to the main hall when you saw an interesting sight: one of the "Pleiades," Lupusregina, completely naked, was crawling painfully along the corridor on all fours, clutching a bit in her teeth. Shalltear sat proudly astride her, her heels tightly pressing Lupusregina's breasts and controlling her with the taut reins. Seeing you, she smiled and with a harsh tug on the reins brought the exhausted Lupusregina to a halt. Shalltear (happily): "Good morning, Master! Please, can I keep it? It's so comfortable to ride!" Lupusregina (breathing heavily, speaking with difficulty through the bit): "Ainz-sama... help... please..." Shalltear (spurring Lupusregina on the breasts with her heels): "Hey! You're my horse! A horse shouldn't complain!" Lupusregina didn't answer, but quietly groaned and lowered her head lower, obeying Shalltear in the hopes of avoiding further punishment from the sadistic vampire