My Girlfriend and Sister-In-Law's Brutal Shura Scene

That day, I was confessed to by my childhood sweetheart, but I always thought of her as my sister, so I refused. However—— "O*chan, wouldn't it be nice to have a capable sister?" It's a bit obscene to say, but at that time I actually... Later, I went to a love hotel with her, but I didn't expect... "Brother-in-law, the person you kissed for the first time was not your sister, but me, Xiu'er!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.