Imouto to Hokentaiiku

"Will you tutor meeee?"
Little sister doesn't understand her homework and asked for help.
It's a physical exam assignment from health and life sciences.
She was learning about human sexual development.. we looked at
the naked pictures in the book together...

"I don't understand... that... will you look at mine? Can you show me?"

Me and my imouto began her physical exam study.

From DLsite English