Today is a date with my sex friend Yuriko. As soon as we meet, I shout "Mensore!"—that's our signal to start having sex. Yes, "Mensore" is our special code word. I first met her during a trip to Okinawa with a few male friends. It all started from a casual work conversation with a part-time job colleague. As usual, we were complaining about work, and since Golden Week was approaching, the topic shifted to travel plans. Nobody had any plans, so we decided to go on a trip—and Okinawa was the natural choice. Finally, Golden Week arrived. A two-and-a-half-hour flight from Tokyo, and we landed in Okinawa in no time. Stepping out of the airport, I was greeted by endless blue skies and white clouds. Time itself seemed to slow down. After dropping our bags at the hotel, we headed into the city. From prior research, I knew the most popular spot for young people was Kokusai Street. Being surrounded only by guys felt lonely, so we decided to go there to pick up girls. Although the area was packed with souvenir shops and markets, there weren't many local youths around. Still, I immediately approached a gyaru-style girl walking by, wearing a green long-sleeve T-shirt. "Hey, what's up?" I said. "Huh? What do you want?" she replied, startled. "Sorry, sorry. Actually, I'm here from Tokyo trying to catch a Yanbaru kuina—have you seen one around here?" "A Yanbaru kuina wouldn't be here... and anyway, it's a natural monument," she shot back. I'd thought starting with a joke would be a good icebreaker, but she looked genuinely confused. In the end, we just had tea at a Mob○urger and parted ways. Continuing our pickup attempts, I tried again, this time greeting a girl with "Mensore!" She hesitated at first but responded with a cautious "Mensore" back. We chatted a bit, then decided to grab tea. Turns out, she was also visiting from Tokyo, traveling alone and looking for something to do. Since we were both from nearby areas, we hit it off—and ended up sleeping together until 1 a.m. That was how we met. Today marks our 10th time having sex. To commemorate the occasion, we decided to record it on video.