Inside the Aerial Fortress.
Sasuke, who had completed the transplant surgery, lay on the bed, sensing the fusion of his ocular power.
Throughout the process, the swelling in his eye sockets had persisted, but it had eased considerably compared to when the surgery had just been completed, and the stabbing pain had mostly disappeared as well.
"Because it's the fusion of two pairs of eyes, can they only be transplanted between blood relatives...?"
With nothing else to do, Sasuke let his thoughts wander as he sensed the fusion of his ocular power.
Though he had never formally studied medical ninjutsu, Sakura had been interning at Konoha Hospital ever since graduating from the Ninja Academy and often told him about matters related to medical ninjutsu. Thus, he was not entirely ignorant of it and knew that organ rejection was relatively minimal between blood relatives.
"Ugh... It's starting again!"
Suddenly, Sasuke's entire face twisted in pain, and two streams of bloody tears seeped out from beneath the bandages around his eye sockets.
This sudden, intense pain was clearly not the first time it had occurred. Including this time, he had experienced it four times already. Each episode came without warning, was not only fierce, but was also accompanied by bloody tears, as though he were using the ocular techniques of the Mangekyō Sharingan while in an overdrawn state.
However, the excruciating pain came quickly and went quickly.
After only a few breaths, the pain subsided. What followed was a massive increase in ocular power, so great that even Sasuke himself clicked his tongue in amazement.
After catching his breath, Sasuke got up and took out the notebook Hyuga Kagami had left behind, carefully recording everything.
"Today, the fourth bout of pain occurred. The process was as brief as the previous times..."
"After