A female classmate from the same university who is easygoing and acts like a guy friend. While we were hanging out as usual, I suddenly saw her underwear and her body, which were more erotic than I imagined!? I couldn't contain my arousal, so my classmate looked at me with a girly face that I don't usually show...before we knew it, we were both doing it until the morning! From that day on, my excitement at her becoming more and more feminine couldn't subside, and the two of us had sex like it was a lie that our relationship had existed until now!