Chapter 6

First, the redhead had tried to place a knight piece into his chest. His body rejected it instantly, and a pouting Rias set it aside before trying again with a rook. That failed too, which led her to test a bishop next. That didn’t work either. In the end, it became clear that Issei didn’t fit into any of those roles at all. His power simply couldn’t be boxed in, even if it annoyed him that the only remaining option was Rias’ pawn pieces.

When Rias finally accepted that pawns were the only path forward, she at least didn’t insult him by starting with just one. Instead, she jumped straight to four, pressing them into him one after another. At first, everything seemed fine. His body didn’t reject the pawns like it had the other, more specialized pieces.

Still, nothing else happened. Despite having four pawns inside him, Issei hadn’t turned into a devil.

So Rias added a fifth, with no visible change. A sixth followed, and then a seventh. Issei found it oddly amusing to watch Rias pace around the room, her chest bouncing as she held up the final pawn in her trembling hand.

“W-what if it doesn’t work, Master?!” she blurted out. “What if you’re too strong for even all of my pawns? How am I supposed to turn you into a devil so we can stay together forever if not even eight pawns are enough?!”

Issei chuckled at first, then rolled his eyes. It had been funny, but her panicked rambling was starting to grate on him. He let out a low grunt to get her attention.

“Just do it,” he said flatly. “If it doesn’t work, we’ll deal with it then.”

Blushing at the sharp response, Rias nodded quickly and stepped forward, biting her lower lip as she reached out and pressed the final pawn into Issei’s chest. With all eight pawns inside him, he finally felt it. A brief glow passed through his body, and instinctively he knew the change had taken hold. He was a devil now.

At the same time, though, Issei noticed something else. Raising a brow, he realized that if he wanted to, he could revert back just as easily, casting off Rias’ evil pieces whenever he chose.

Issei didn’t share that thought with his new “king.” As he looked down at Rias’ stunned, overjoyed expression, it was clear she wasn’t changing her attitude now that she could technically claim him. Instead, the crimson-haired devil dropped to her knees and rested her head in his lap, gazing up at him with open devotion.

“It worked! Master, it finally worked!”

Issei smirked and gave a small nod. It had, though his thoughts were already drifting elsewhere. Whether it was the new hellish power stirring inside him or something far simpler, he suddenly felt the urge to continue what had begun between them.

With a low grunt, Issei reached down, caught her by the hair, and pulled her up into his lap. Rias yelped in surprise, then followed his unspoken direction, settling against him and looking up with wide, uncertain eyes.

He turned her gently but firmly, drawing her back against his chest. His hands moved over her curves as he held her there for a moment, simply taking in the reality of her presence and what she now was to him.

Rias let out a soft, needy sound, then stiffened as she felt his arousal press insistently against her from behind. Her eyes widened as she glanced back over her shoulder, her lower lip caught between her teeth.

“M-Master… I’ve never… like this.”

Issei met her gaze, saying nothing. The meaning was clear, and Rias flushed deeply as the truth settled in. Before today, she had never known any of this at all. Everything was new, overwhelming, and frightening in the same breath.

Burning with embarrassment and anticipation, Rias instinctively tried to hide her face as Issei lifted her slightly, guiding her into position. His presence pressed close, leaving her breathless as he drew her down, slowly and deliberately, until she was completely claimed by the moment.

Rias gasped, her body tensing as she struggled to adjust, her thoughts spiraling as sensation overtook her. There was no stopping it now. Issei held her firmly, and Rias could only cling to him as he took her, the final line between hesitation and surrender disappearing completely.

—

Still, the redhead hadn’t expected to enjoy it as much as she quickly started to. Only a few minutes after Issei began driving into her, Rias’ sharp gasps melted into needy moans. She groaned as he started thrusting deep inside her ass, but in the end all she could feel was pleasure, both from being taken that way and from knowing she was serving her master like this.

Rias Gremory cried out shamelessly as Issei lifted and dropped her soft, rounded backside on his shaft, working her tight ass without holding anything back, and when it came to Issei, that meant he gave her everything he had.

Even so, she was unbelievably tight back there as he claimed her final virginity. Her muscles clenched hard around his driving cock in a way her pussy never could, squeezing him with every thrust as her body reacted helplessly to the sensation.