After her climax, Katerea lay limply on the floor, savoring the afterglow. But Ethan wasn't finished. He covered her mouth with one hand and grabbed her stomach with the other, driving his hardened cock back into her hyper-sensitive passage.
"Mmph! Mmmph!"
The waves of pleasure returned, more intense than before. Tears pricked Katerea's eyes; the pleasure was so extreme it felt like torture. Her body instinctively tried to clamp down, making the experience even better for Ethan.
Eventually, the intensity slowed. Ethan noticed the "hunger" in her eyes and slowed his pace until he stopped entirely. Desperate, Katerea began to move her own hips, sliding up and down his shaft, her black-stockinged legs gripping him tight.
Ethan let her serve him, feeling her internal muscles massage him. Finally, he felt the urge to release. He grabbed her hips and began a final, rapid-fire assault. After a few hundred thrusts, he reached his limit. He drove deep into her womb, shooting a thick torrent of white essence into her waiting palace.
After a perfect round of dual cultivation and a belly full of life-essence, the fire that had consumed Katerea for a month was finally extinguished. But she wanted more. Why stop at one? She wanted to be filled until she was sick of it—though she suspected that was impossible.
She wanted to store as much essence as possible to last her until her next visit. Frequent trips to the Human World were hard to explain to her family. Ethan didn't refuse her "request" for a second round, but he didn't indulge her indefinitely either.
After the second round, he realized he still hadn't broken through to the Demon King class. The "tolerance" issue was becoming a real concern. He sent Katerea back to the Underworld. He couldn't spend the whole first night of his new home on one woman.
Before leaving, Katerea tried to regain her "Cold Demon King" persona. But since she was covered in white stains, wearing nothing but a torn shirt and stockings, Ethan found her "acting" hilarious. He almost bent her over for a third round, but he saw the hopeful glint in her eyes and stopped himself.
Close call. This "innocent" dark-skinned lady is getting craftier.
After establishing their "Master and Slave" dynamic and exchanging contact info, the meeting ended. Ethan returned to his top-floor room before midnight. He informed Rias of everything through the Soul Network.
Rias was shocked but quickly cooperated. She and Akeno helped mask the magical fluctuations from the basement. The others, like the innocent Asia, didn't notice a thing.
With the emergency handled, the real night began. It was summer vacation, and they had nothing to do tomorrow. Ethan lay on his massive bed and called Rias, Akeno, and Yuuma. He spent the night helping them "cultivate." By dawn, Rias Gremory successfully broke through, becoming the second SSS-rank powerhouse in the club after Ethan.
The month of August passed slowly. Akeno and Yuuma followed Rias into the SSS-rank shortly after. During the night of the full moon, Ethan signed soul contracts with Koneko Toujou, Mittelt, and Kalawarner.
Looking at the three beauties tangled together on his bed, Ethan let out a sigh of satisfaction. Six of his nine soul contract slots were now filled, but the effects were undeniable. After finishing the contract with the tall, leggy Kalawarner, a massive surge of energy finally shattered the invisible barrier within him.
Ethan had officially stepped into the Demon King Class.
If he hadn't broken through, he was genuinely considering making a move on Grayfia Lucifuge or visiting Sona Sitri in the Underworld to "get closer" to her magical-girl-cosplaying sister, Serafall Leviathan.
Ethan didn't feel a massive change at first—just more mana and a stronger body. He hadn't tested his combat power yet, but with his Boosted Gear and "Juggernaut Drive" capabilities, he was confident he could take on two or three opponents of the same rank simultaneously. Once he reached the "Super Devil" rank through dual cultivation, he would regain his absolute dominance.
While Ethan was calm, the impact on Rias and the others was profound. The "buff" they received during dual cultivation was now three or four times stronger than before. The younger ones, like Koneko, found they couldn't even "digest" his essence anymore. They needed days of rest after a single session to absorb the massive amount of energy he pumped into them.
As his strength grew, new ideas began to form. He thought about getting a powerful familiar or perhaps forming his own "Valkyrie Guard"—an idea sparked by a mention of the Norse gods from Vali's group.