Some time after I began working as a private tutor for a pair of young sisters from a wealthy family， they suddenly asked me to teach them something unexpected―sex education.
Having grown up in an all-girls school， the two were intensely curious about the opposite sex and eagerly absorbed everything I taught them.
I got a little too into the lessons and ended up teaching them all sorts of things.

Cover ＋ 55-page main story × 4 variants
（Glasses and Hair / Glasses only / Hair only / Neither）