いもうと催眠 ～ナマイキ妹を催眠術で言いなりに！…したつもりが、俺の方がヤられまくってる件について～

I had an extremely estranged sister.
Yuika was cheeky, nosy, and complained every time I saw her. There was nothing cute about her; she was just plain irritating. She had been especially annoying recently and I had been wondering if there was anything I could do about it.

Soon afterwards I found an interesting website.
It was about ‘hypnotism’ and stated that anyone can learn it easily. I decided it was worth trying and immediately gave it a shot, but…