"Unraveling the Threads of Reality"

As they walked out of the psychiatrist's office, Kageyama's phone continued to taunt him with its blank screen and the ominous single word: "Hello". Oikawa tried to reassure him that they were making progress, that the psychiatrist was going to help them uncover the root of the problem, but Kageyama couldn't shake off the feeling of unease. The city streets seemed to blur together as they walked, the sounds and smells of the bustling metropolis fading into the background. Kageyama's eyes darted back and forth, his mind racing with the messages and the voice in his head. He started to feel like he was losing his grip on reality. At first, it was just a slight twitch in his eye, a faint whisper in his ear. But as the minutes ticked by, the sensations grew stronger. He started to see movement out of the corner of his eye - a shadowy figure darting between the pedestrians, a fleeting glimpse of something lurking in the alleyway. Kageyama spun around, but there was no one there. The figure had vanished, leaving behind only the echo of its presence. He felt a surge of frustration and irritation, his mind screaming that he was not going crazy, that he was seeing things. Oikawa noticed the change in Kageyama's demeanor and placed a hand on his shoulder. "Kageyama, what's wrong?" he asked, his voice low and concerned. Kageyama's eyes locked on Oikawa's, his pupils dilated with anxiety. "I see things," he whispered, his voice trembling. "I see movements, hear voices. It's like my brain is playing tricks on me." Oikawa's expression softened. "We're going to get through this, Kageyama. The psychiatrist is going to help us." But Kageyama was beyond consolation. He shook off Oikawa's hand and started to walk faster, his long strides eating up the distance. Oikawa had to jog to keep up with him, his eyes scanning the crowds for any sign of danger. As they turned a corner, Kageyama suddenly stopped dead in his tracks. "Did you see that?" he asked, his voice low and menacing. Oikawa followed his gaze, but there was nothing there. Just a lamppost, a street sign, and the endless stream of pedestrians. "What did you see?" Oikawa asked, his voice cautious. Kageyama's eyes locked on the lamppost, his pupils constricting with rage. "I saw someone hiding behind it," he growled, his voice low and menacing. "I saw them watching me." Oikawa placed a hand on Kageyama's shoulder, trying to calm him down. "Kageyama, there's no one there. You're just seeing things." But Kageyama was beyond reason. He shook off Oikawa's hand and started to walk away, his eyes scanning the crowds with a growing sense of paranoia. Oikawa followed him, his heart sinking with worry. Was Kageyama's grip on reality starting to slip? And what would happen if he lost his hold on sanity altogether?