Crocus

The comment by the little sister seemed... slightly sinister? I guess I'm not clear on exactly the fashion she's interpreting her elder sister's "favour".

I enjoyed the intensity of this.

This seems like the set up for a legacy predator, where this "trusted" teacher after starting with the older sister finds his attention drawn to the younger sister as well. Perhaps the younger brother grows up, buffs up, and beats the crap out of his predatory, punk ass! THAT is a happy ending worth getting to, just saying...

As someone else described a work by another artist (I think it applies similarly here):

"Deep Shit EX-Rank!"

Taken by itself, Sazasuka-sensei's behavior in this story, at a minimum, creeped me out, yo. But since it's the first part of a series, I'll seek to hold final judgement until I get through all chapters posted to date.

MY feels. They dont know what to feel... so they are feeling things they might not need to feel.... you feel me?

The little sister knows whats up （´<_｀　）

I feel like the younger sister heard them having sex and overheard them talking. Hence why she covered the little bothers ears. The younger sister is aware that her older sister is doing it for them. So she's saying they should return the favor later.

I think lil sis means helping out later when she's older how her older sis said she wants to help her family. But after @Genryuusai
Pointed out the authors genre my heart feels like some shit is gonna pop off.

All these implicit suggestions of a more complex backstory is kind of awesome! Hope that guy doesn't take advantage of her younger siblings once she's gone...

Seriously, Confusing feels over here. A bit pissed off, sad, and kinda happy all at the same time.

I really do love the art.
"If I get you pregnant, you'll stay with me forever"? That's some great logic man, and I like it.
I even quite liked that ending. I mean, sure she said she'll leave, but at least she seems rather receptive of his feelings.
But the other part of that ending intrigues me a little, especially what the little sister meant by 'returning the favour'...I was also slightly disappointed she didn't get a scene, but that ending really does interest me. Makes me wonder if there'll be a sequel.

I want more of this. If Nanamiya-sama releases a books, I dont mind to buy it all!

But this is so sad, great story but very very sad

The ending was really sweet! Don't know why this isnt vanilla.