“Don’t worry, I won’t kill him.” He said easily as he removed the needle. “Young man: as for what happened here…”

Damn it! What kind of sick joke is this!? I can’t back away now!

The alchemist, apparently seeing through Kamijou’s heart, smiled. “…Forget everything.”

[...]

Kamijou bent his head with puzzlement. It was strange. Why did he feel like he had forgotten something important? It was like forgetting to turn off the stove before going on holiday, that sort of irresolvable danger.

What’s going on? Kamijou thought about the Misawa Cram School that he had never been to and muttered.

“Nevermind. If I can’t remember, it’s probably not important.”

Toaru Majutsu no Index vol.2 ch.3 pt.3