On the night of a takoyaki party with my best friend, his girlfriend, and my girlfriend, my best friend's girlfriend unexpectedly confessed that she had always liked me! I started to be interested in my best friend's girlfriend, who was originally a close female friend, and when we were drinking together later, I let my drunkenness get the better of me and I crossed the line by flirting with her. I felt guilty, but I was overwhelmed by the pleasure of having sex and the good physical compatibility! In the end, I continued having sex with my best friend's girlfriend until the morning, and even deceived my boyfriend who came to pick me up, and indulged in forbidden transfer creampie sex...