"Senpai, last night was incredible. I never knew you fucked that hard—and so many times. I think I'm addicted." After drinking until he blacks out, a senior employee wakes beside his usually aloof junior coworker Kana Momonogi, with both of them completely naked. She suddenly turns affectionate and begs for more, apparently obsessed with his tireless huge cock. A broken air conditioner extends their hot-spring stay into thirty-six sweaty hours of forced thrusting until he has no semen left, yet she still whispers, "Senpai, let's do it one more time."