C47 Substitute for an Older Sister

Looking at Nana's grinning mouth, I was suddenly stunned. I felt as if I had misjudged her.

She was just a mentally unsound child. When I looked at her with the eyes of a normal woman, it was like I was looking at a gentleman with a petty heart.

Just as I was about to get along with her, Nana pursed her lips and said something that disgusted me.

I heard her say.

"Substitute sister