Thunder it was. I figured that it was 40% stronger compared to the alternatives. Assuming these 'quarts' work like that. Not to mention, this was also my teacher’s speciality. And... it also potentially fills a function I would be lacking: I can presumably use my own electric power as an alternative to making complex electrical blasting caps. If I get to the point of making very strong, yet stable explosives like C4, this is going to be essential.

Seria cackled at my choice... but quickly straightened her face... and then proceeded to instantly blow me across the room with a charged blast out of nowhere. I didn't sense any danger at all.

I crashed into a wall, juddered and collapsed from losing the feeling of my legs, as electricity surged through me. My ears rang from the thunderous roar.

As I lay sprawled on the floor, she came over and squatted next to my face. Addled as fuck, for some reason I can still appreciate the close up view of her black panties and bare midriff. Priorities...

"I am sorry." She pats my shaking head. "But this is the quickest way to force thunder spirits inside you. Normally we attune over a few months... but..."

I can't respond. If I try to talk I'll probably bite my own tongue off.

As I shake, the door to the room slams open. Aria is stood there in a casual looking blue one piece dress.

"What happened?! Ahhh!!!"

She sounds underwater to me as she shouts. She dashes forwards, but Seria holds her back with an outstretched arm.

"Please do not touch him. He is attuning." Seria growls.

Aria holds back a snarl and starts stomping around. It is about half a minute before she stops pacing. The other concerned girls, all also wearing various forms of casual dress, arrive in the meantime, followed by some house staff.

"You idiot, onii-chan! Why did you pick thunder?" Aria growls.

"At least I didn't have to bury him alive, or break a knife inside him. Those were his other options." Seria says something scary.

Aria and others stay quiet. The shocks continue to run across my body, and I find I can't take it anymore.

I pass out.

... ... ...

... ... ...

"He's coming to."

"Thank Sendervils mercy."

The voices make my head ache.

Thunder harrowing completed. 2 skill points awarded. There are new selections you can choose to learn.

I get the announcement in my head straight away. It reminds me why I was passed out in the first place. I still feel a bit numb from the shocks. Inside, I feel a bit weird, like I am shaking in anticipation or have nervous energy to spare.

I open my eyes and see Aria's face up close, peering down in concern. Thinking about it, there is a soft feeling on the back of my head! Is this... the legendary lap pillow?

"It's an angel. I'm in heaven!" I exclaim.

"Oh shut up, Elijah! Don't even joke like that!" She gives me a deadpan look, and lightly throws me off. I think she blushed for an instant though.

"The lady doth protest too much, methinks." I mumble into the carpet before sitting up.

The four girls are unilaterally stunning right now. Aria and Rishya are in matching casual one piece dresses. Kiku and Kaede are in dressing gowns of some sort, both with their hair down. Kaede's hair is actually pretty long outside that bun, huh? Were they in the bath!?

"Um... he is about normal then, hehehe..." Kiku titters, shying from my gaze.

"If you mean he is a shameless fool... yes, quite." I hear from Rishya.

"Nii-sama, did you select thunder because Seria-sama would be your tutor?" Kaede asks, beckoning behind me. I guess Seria is behind.

I stand up, brushing myself off as I face the girls. "That's part of the reason. But mostly because it can be used to help with explosives."

"What is ecks-plou-zivvs?" Rishya asks about the sudden strange word I doubtlessly just came out with.

"It is the boy's otherworldly secret weapon. I have also yet to witness it. I am trembling in anticipation myself, fufufu." Seria answers from behind. I can't tell if she is being sarcastic. I look back. Whilst the others are crowded around me, she has gained a pair of spectacles and is writing at the desk, mostly unchanged from before.

"Though I merely saw it from a distance, it was indeed impressive, yes..." Kaede says. Did she just try to compliment me?

"Huh... I best get started on making some more then. Errm... but what about the rest of my lesson, Seria?" I question.

"Mmmm?" Seria looks up from scribbling. "Ah... that should not be necessary for now. I am preparing some reading material for you, but now that you are attuned, you should be able to generate shocks without much effort. Get used to that first. Simply imagine storms as you did during your attuning."

I close my eyes. At that point, when Seria was asking me to imagine a storm, I actually thought about an impressive electrical arcing apparatus I saw at a science festival once, though I didn't tell her. It was similar to that famous picture of Tesla. I guess, because I come from a place that utilises plentiful electricity, and I understand basic stuff about current and voltage, that gives me my affinity for it?

I think about that again, and suddenly, I feel the hair on the back of arm raising all at once. As I open my eyes, a tiny jolt of electricity arcs outwards.

Aria's hair suddenly puffs outward in all directions.

"Oh? Most impressive, ufufufu."

All the other girls join Seria and burst out laughing. Even Rishya can't not snigger behind a hand. Well, a silvery afro is quite ridiculous.

"E~LI~JAH~!" Aria's mouth is twitching in a terrifying smile as she stomps up to me, cracking her knuckles.

Time out! I don't know how to aim! Halp!