Magic manipulation: it's the way that allows the users to manipulate objects or things. Also, it is one of the basic abilities that should everyone know since this is mostly used in the Academy in this strange world.
Riku heard this kind of stuff in the novel and manga he read so he had an idea what it was. But the problem here was, he didn't know how it exactly work. Remember, the power in the world he came from was called "Gene's mutation." Where was the monster's gene transfer to a certain human body. By doing this, they would grant the power and physical strength that the specific gene that has.
"It seems that you're not familiar with the magic that this world had. Can you tell me where you exactly came from?" Naina asked him with a serious tone.
She was narrowly looking at him within the eight meters gap they have, at the same time, she was blinking her eyes for some reason.