Imouto ga Onna Kishi Gakuen ni Nyuugaku Shitara Naze ka Kyuukoku no Eiyuu ni narimashita. Boku ga. - Ch. 1

[ScryedParadox]

The massage was just the preliminary warmup. The real training involves sword training with his sister, constantly stabbing her with his legendary chunchunmaru blade until she collapses from the overwhelming intensity of the training. That is the true alabama way of training to the peak of power that she is at, and his body simply became more resillient and immune to all physical wear, tear and fatigue due to that constant aggressive combat... Well, if there was an erotica tag anyways.

 

[sanglyon]

You know it's gonna be dumb when there's line like "she defeated 100 000 enemies before enrolling in school".
That's an average of 34 people a day, every day, for 8 years. But big numbers look cool, amirite?

 

[GreC_89]

You know, this is absolutely insane to say, but this is actually toned down compared to the novel. I'll admit, it's been a fair while, but I'm pretty sure the novel for this one heavily implies the massage, while still with his hands, includes an "inside" portion in addition to the "outside" shown here...

I mean, I could be mistaken, but I'm not recalling any other novels with this specific premise...

Here some similar. Disclaimer, it's even worse than anything worse can be, story wise.

 

[FoxDie85]

Oh... Another one of those "I'm very strong and everyone knows it except me"

 

[Zero00_X]

I mean I didn't have any expectations for this but it should at least make the thirty chapters

 

[OppaiDragon]

Dude doesn't even have a name. He is always refered as "Suzuha's brother".