Meanwhile Ishida feels guilty

Back near Mayuri's lab, Ishida had never seen anything quite so bizarre in his life. Fresh from a treacherous mission in Hueco Mundo alongside Nemu, where they narrowly escaped with their lives, Ishida now found himself thrust into a spectacle that surpassed any semblance of normalcy.

The mission to capture the Arrancars Harribel and Nelliel had been, to say the least, a perilous endeavor, fraught with danger at every turn. However, against all odds, Ishida and Nemu had managed to carry out their objective, using the soul candies provided by Mayuri to infuse the Arrancars with his twisted essence. It was, as Mayuri dubbed, a necessary evil, a means to an end in their battle against the encroaching darkness.

But now, as Ishida observed the aftermath of their successful mission, he couldn't help but feel a mixture of fascination and repulsion. Harribel and Nelliel, once formidable adversaries, now bore the mark of Mayuri's experimentation. Their actions defied all his logic and reason, as they engaged in a heated, passionate, and intense sexual intercourse, right in front of Ishida’s eyes.

“Nghh… Harribel… Akh!!” spreading her legs wide, a very breathless Nelliel gasped and moaned as Harribel, her mouth buried in the warmth between Nelliel’s thighs, was busily working her tongue to lick and suck, endlessly teasing Nellie’s sensitive clit. She was soaking wet – as if to tell Harribel just how much she enjoyed being teased, but Harribel wasn’t satisfied until she could make Nelliel scream in pleasure. Determined, she spread Nelliel’s opening with her left hand and slid her fingers inside Nelliel’s opening, exploring the velvety warmth inside. Granted, this made Nelliel scream even louder than before.

“Nghhh! OH! Yes… Harribel… Yes!!” losing all control of herself, Nelliel moved her hips vigorously to match the pace of Harribel’s finger, the way the dark-skinned Arrancar rotate the fingers inside her drove her crazy. She wanted to be drunk in this moment, feeling nothing but the thrust of Harribel’s long, powerful fingers inside her, again and again until she came. They both seemed blissfully unaware of Ishida, who was watching them from the sides, his stomach churning at the view. In that moment, Ishida found himself grappling with a profound sense of unease. The successful completion of their mission had come at a great cost, and the consequences of their actions now stared back at him in the form of Harribel and Nelliel. He couldn't help but wonder if they had truly accomplished something worthwhile, or if they had merely fallen victim to the twisted machinations of Mayuri's experiments.

As Ishida stood there, consumed by a mixture of concern and moral dilemma, Nemu materialized suddenly at his side, her expression void of emotion as always. She glanced at the bizarre scene unfolding before them and turned her gaze back to Ishida, her voice monotone yet curious.

"What troubles you, Ishida-san?" Nemu inquired, her eyes fixed on him.

Ishida hesitated for a moment, wrestling with his thoughts before finally voicing his concerns. "Nemu-san, don't you find this experiment… wrong? Look at what Mayuri… what we have done to them. He talked about us and the experiment as ‘breeding’… as if we are some kind of animals!"

“Humans are nothing more than intelligent animals,” came Nemu’s impassive reply. “Mammals, to be exact. I’m sure Mayuri-san thinks about Shinigami, Sternritters, and Arrancars as the same.”

“That’s not what I meant,” Ishida sighed. “And don’t you find anything morally troubling in this, at all?”

"Morality is a subjective concept, Ishida-san," again, Nemu responded matter-of-factly. "In the pursuit of knowledge and scientific advancement, morality often takes a backseat. Science seeks to unravel the mysteries of the universe, and sometimes sacrifices must be made to uncover the universal truth."

Ishida sighed, feeling a pang of frustration at Nemu's detached perspective. "But there has to be a line, Nemu. We cannot simply disregard the consequences of our actions. We have a responsibility to consider the ethical implications of what we do."

Nemu tilted her head slightly, processing Ishida's words. "Responsibility... I understand the concept," she mused. "But in the realm of science, responsibility lies in the pursuit of knowledge. The pursuit of truth takes precedence over personal morality. Why don’t you see it this way, Ishida-san?" Nemu took several steps closer toward Ishida, then traced her fingers gingerly on Ishida’s open skin, which made the Quincy draw back in surprise. “Don’t be alerted,” Nemu said, “I only wish to put you into the mood.”

“The mood for what?” He said.