Alright, by using the arte books, it's possible to raise the level of an arte.

And recently, it became more convenient because you can use the total required amount at once.

Oh~

Let's see, the total required is 300.

*Ah!*

That's for beginner class books,

but if you use ultra class books, the required quantity will decrease.

Yeah, but I'm fine with 300.

*chuckle*

*chuckle*