HUNTA-591 My childhood friend has become more mature than I imagined, and his body is so erotic that I get a full erection! Since both of our parents are going on a trip, my younger childhood friend comes to stay at my house and we stay home alone. My younger childhood friend, who I've been treating like a sister, is so cute that I'm super nervous! However, my childhood friend was innocent and didn't know that I was nervous...