"Zenitsu..."
"Grandfather, I'll protect you."
At that moment, Jigoro Kuwajima was overwhelmed by conflicting emotions.
The timid Zenitsu could now stand on his own, while Kaigaku, the boy he had once been so proud of, had become a demon and attacked him.
Jigoro Kuwajima closed his eyes, recalling the days when Zenitsu and Kaigaku had both trained under him.
"Learn from Kaigaku! Stop being so timid! Be more like your senior!"
The thought that Kaigaku, whom he had once held up as a model to spur Zenitsu on, had become a demon made Jigoro Kuwajima's chest ache. Worse still, Kaigaku was now turning the breathing sword techniques he had learned from him-techniques meant to slay demons-against the Demon Slayer Corps and even ordinary people.
Sensing his grandfather's sorrow behind him, Zenitsu fixed an even graver gaze on Kaigaku.
You actually hurt Grandfather... I'll never forgive you!!!
In Kaigaku's eyes, the image of Zenitsu as a coward gradually began to distort.
A... a demon?
No, I'm the demon here!
"Who needs the First Form anyway?! I've already become a demon and gained eternal life. All I have to do now is keep eating people. One day, I'll develop sword techniques that belong to me alone!!!"
Gritting his teeth, Kaigaku swung his dark-gold demon blade at Zenitsu and Jigoro Kuwajima.
"Thunder Breathing, Second Form: Rice Spirit!"
"Thunder Breathing, Third Form: Gathering Mosquitoes into Thunder!"
"Thunder Breathing, Fifth Form: Hot Boundary Thunder!"
"Thunder Breathing, Sixth Form: Thunderclap and Roar!"
A crazed grin spread across Kaigaku's face as he repeatedly unleashed the five Thunder Breathing sword techniques other than the First Form.
Using sword techniques this rapidly was something he had never even dared imagine as a human. He had not even reached the Constant state. Forget Upper Rank Six and a Half-even a