MUFR-002 The day I crossed the line with a mere female friend. ~Our friendship turned from a little prank into a sex friend relationship~

A group of close friends, both male and female. Kanon is a bit outspoken, so she doesn't have many female friends and has always hung out with male friends. The three of them decide to go to a newly opened hotel nearby. Getting high at the hotel, they decide to play a game of rock-paper-scissors and then masturbate as a penalty. When her male friend starts undressing and stroking his penis in front of her, Kanon is amused at first, but then...