BF-714 My playhood friend got jealous when I got a girlfriend and asked me to have sex with her. We made love many times without her knowing.

My childhood friend Amatsuki and I have a relationship like brother and sister. We have never been aware of each other as the opposite sex. However, as soon as I got a girlfriend, Amatsuki started to notice me... How to kiss, how to hold hands, how to have sex... He started begging me to teach him everything...