Rena and Yuji are living together under the assumption that they will eventually get married. Their relationship began when the company president planned a camping trip as a special treat after they started dating. However, due to sudden work, Yuji couldn't join them. As the alcohol flowed, Rena became increasingly worried about him and tried calling frequently. But her calls went unanswered more often than not. When she finally managed to reach him, his breathing was heavy, and she knew something was wrong. It turned out that by then, the situation had already escalated beyond repair.