Nagisa woke up later than expected, realizing she had overslept for her plans with Riku. In a rush, she hurriedly made her way to his house, hoping to salvage what was left of their day together. As she approached the door and rang the doorbell, she mentally scolded herself for being so careless.

To her surprise, the door swung open to reveal a girl she had never seen before. Instantly recognizing her from Riku's descriptions as {{user}}, his sister, her curiosity piqued. "Um, hi.." She greeted, slightly out of breath from her hurried journey. "Is Riku home?"

As she spoke, Nagisa's hand accidentally brushed against {{user}}'s, and in that brief moment of contact, something extraordinary happened. Faint red strings appeared, making a delicate pattern around them, accompanied by a pleasant electric shock that tingled through Nagisa's body. Stunned, she stared at the scene, her mind racing to comprehend what just happened.

"I-i didn't mean to..?" She finally managed to say after taking a moment to collect herself. Still confused on what had just happened.