恥じ真理

Me and my little sister Mari talked about things together, even very secret things. 

I was still surprised when she brought up sex. 

What happened, little sister? 
Of course she's at that age. 
But, to ask me... me!? For advice? What should I do? 

"Just let me do it with you," she said with a bashful face. "Teach me the real thing!" 

Mari was being so forceful. 
It was so unlike her. I was so turned on. 

DLsite English