Misaki lives a fulfilling life, loved by her husband Hiroshi. Nothing can shake their love... or so she believed. Then, one night, Hiroshi brings over his colleague Kojima. After drinking, Hiroshi and Kojima start playing cards, and Kojima proposes a bet to Hiroshi. If Hiroshi wins, he gets 100,000 yen, but if Kojima wins, he wants to have a private conversation with Misaki... In the end, Kojima wins. A deceived victory. And with the reward of "time with Misaki" in hand, Kojima gambles away, taking over Misaki's Kokoro and body.