Neuralyzer, Arifureta Short Stories

“Don’t worry, it’ll only erase a few seconds’ worth of memories. And it won’t replace them with fake ones like the memory devices used by agents of a certain alien-fighting agency. But it does have this nifty brainwashing— err, I mean, hypnotic suggestion ability that—”
...
“Who knows what those fanatics might do once they get jealous... I’m not willing to risk an incident happening.” Hajime’s argument was starting to win the girls over. But just in case, he flashed his silver pen while their attention was all on him.
A second later, Yue and the others exchanged glances and muttered, “You have a point...” “Plus, what if someone discovers she’s a dagon? Who knows what government organizations will go after her if that happens. Aren’t you scared of what they might do? Don’t you care about Myu at all!?” Hajime shouted.
This time, he shot a flash of red light out of his pen. Yue and the others’ eyes glazed over this time.
“We do care about her!” they shouted in unison. Firing off one last flash of light, Hajime finished by asking, “Then shouldn’t you all help teach Myu how to defend herself too!?”
“Mmm... I’ll think of a way to make it possible for Myu to use magic!”
“I’ll teach her hand-to-hand combat!”
“I’ll show her how to dual wield swords!”
“I’ll teach her the Yaegashi style!”
“And I shall teach her how to turn pain into power!”
“Maybe I can teach her barrier magic!”
“Let’s write all this down, guys!”
“Leave it to me, Ryutarou! I’ll record it all!”
Yue and the others’ eyes were spinning now. Hajime, however, simply nodded in approval and muttered, “Hmm, there’s still room for improvement, but this is definitely usable.”