No, that can't be the only reason.
While his body recovered, Alistair felt the "Mystery" within him. It wasn't pure lust energy; there was a portion of pure white energy mixed in, yet the two didn't conflict.
Who would have thought? Am I now a dual-cultivator of light and dark like some web novel protagonist?
Alistair marveled at the two opposing energies residing peacefully within him. Only those on the supernatural path knew that different energy types were almost never compatible. When he first used the ring, he had accepted that he would likely become a demonic being. He hadn't expected this twist of fate.
Maybe it's a blessing in disguise.
With the "Mystery" restored, his physical abilities returned to their peak. He could now sense the lustful energy within Anna, as well as her faint, pure white energy.
He looked at her face. She was still indifferent. Is it because 'Divine Grace' is a bestowed power? The energy itself has little to do with the person, so she can't feel it unless she's actively using a skill?
Furthermore, the efficiency of his energy absorption was likely an effect of the ring. It had bound to her and was siphoning her energy to replenish him. There was probably a limit to how much it could take at once, which explained why some of her white energy remained.
Alistair had activated [Life Return] to sharpen his mind for a few seconds to deduce this, but the stamina drain was too high, so he switched it off once he had his answers. Using the skill in short bursts was far more efficient.
However, there was one question: when he had been with Izumi Nogami and the others, they had also been "changed" by the ring. Why hadn't he absorbed energy from them back then?
Alistair's hands, having had their fill of her breasts, began to slide downward. Anna didn't stop him; she allowed him to take liberties with her body, even stepping closer. The soft, lily-scented body pressed firmly against him through her habit.
Her licked-clean left hand moved to his waist, joined by her right. She pulled him in tight, and Alistair felt the pressure of her chest against his. As she moved in, his recovering cannon was caught between her thighs.
The soft but firm muscles of her inner thighs rubbed against him inch by inch. The sensation of her smooth black silk stockings was similar to the silk glove but different enough to be intoxicating.
Alistair gripped her buttocks, pulling her even closer. Being over 5'9", Anna was just tall enough to look down slightly and whisper in his ear. Alistair couldn't reach her ear easily, so he settled for "nipping" at her collarbone.
He tried to tear her top open, but the fabric was surprisingly durable. Anna noticed and pulled away slightly. She released his waist, grabbed her black corset belt, and yanked the upper half of her habit upward.
Two pale, soft snow peaks bounced out, capturing Alistair's gaze. He looked up to see her face, but she was still expressionless, her half-closed eyes devoid of emotion.
This irritated him. Her lack of reaction made his efforts feel futile, almost insulting. He leaned down and bit one of her pink nipples, tugging at it gently with his teeth.
Surprisingly, she still didn't react... wait, there was something. He noticed a faint blush creeping up her neck, though her face remained stone-cold.
Anna leaned forward, pressing her breasts against his face. She placed her left hand on the back of his head, stroking his hair, and whispered into his ear.
"Don't do anything unnecessary. You just need to release all the 'stock' you have left."
Her voice was cool and steady. Her breathing hadn't even changed. It was as if nothing he did could affect her. This shocked Alistair. If not for the blush, he would have thought she was physically numb.
But if she could feel it, he had a way to break her.
Ugh...
Alistair shuddered as waves of pleasure shot up from his cannon. Anna had suddenly increased the speed of her thigh-rubbing. The friction was intense, making him want to "vent" again.
He fought the pleasure from the silk stockings, biting her nipples and kneading her ass in a counter-attack. Suddenly, Anna released his head. She reached behind herself and, using only her index finger, scraped the tip of his muzzle through the silk of her glove. The texture of the mesh caused an immediate explosion of sensation.
The tip was the most sensitive spot; such a focused strike pushed him over the edge instantly. Alistair's waist buckled, and a massive amount of "ammunition" poured out like a high-pressure hose.
Sploosh—
The sound of the liquid hitting her palm was loud in the quiet cathedral. Anna didn't stop. Her thighs kept working, and she used her gloved thumb and forefinger to rapidly rub the tip of his cannon, forcing him to stay in a state of climax as long as possible.
It didn't actually last that long, but to Alistair, it felt like an eternity. If the Horse Talisman hadn't fully recovered, he would have needed ten minutes just to catch his breath.
He pulled his head out from between her breasts—leaving bite marks on her nipples—and looked up. To his frustration, she was still calm. That faint blush was the only proof of a reaction, and she'd had that before. In other words, her "progress bar" was stuck, while he was being played like a fiddle.
It seemed he had lost the second round. But that didn't matter. Usually, if someone is that repressed, once you find the "sweet spot," they explode. With his infinite stamina, Alistair had endless chances to find it. And when he did, Sister Anna was finished!
Then, Alistair saw what she was holding in her right hand. His pupils shrunk. He stared in shock for a long time.
In her hand was a beaker—not small, but not massive either. And it was already more than half full of a thick, cloudy white liquid.