https://www.dlsite.com/books/work/=/product_id/BJ243097.html
As always, please support the artist and buy his works.

SEX play - after getting off on my brother's massage service...

I'll comfort you till morning..."
The hot, hard tip crawled up my wet pussy. My brother was in a hypnotic state and wouldn't stop no matter how many times I kept cumming...
I found a suspicious hypnosis light in my stepbrother room. I was drunk from a broken heart and angry that my brother didn't pay attention to me, so I used the hypnotic light to order him to comfort me like a lover.
It was supposed to be a joke, but my younger brother actually became obedient - and his body started to tingle when he whispered sweet words to me and massaged my sensitive parts.
His muscular arms press down on me, and even when I resist, he continues to caress my sensitive body... What am I going to do, I'm going to end up with my brother...!

English webtoon version (ch 1-21): /g/2108137/9efefa9a17/