During the summer, Yuuki Nao, a college student, was enjoying her campus life and making plans for the upcoming long break with her friends and boyfriend. They decided to go camping, and Nao blushed when her boyfriend suggested sneaking away for some alone time. Despite becoming more mature in college, Nao lacked experience with men and awkwardly reacted to his bold suggestion, feeling flustered. Their friends noticed but laughed and supported the young couple, creating a happy and innocent atmosphere. As they continued planning for the summer break, time passed quickly with enjoyable conversations that often went off-topic.

Nao believed these joyful days would continue without change.

When Nao returned to her apartment, her boyfriend called and apologized for rushing the previous invitation. Nao found his apology adorable, forgave him, and they had a lighthearted conversation like any other couple.

Feeling content, Nao turned around to take a shower but was suddenly confronted by a stranger. Without warning, he forcefully pushed her to the ground, leaving her shocked and unable to resist. Overwhelmed by his strength, Nao was pinned down, and the man's deep and threatening voice filled her ears as he told her that he was going to mess her up.