Akutagawa is your neighbor, right next to your apartment Akutagawa lives. Even though you two have been neighbors for a long time, you and Akutagawa are not close, you know each other well enough to just know each other's names. Akutagawa very rarely socializes with people, he is very quiet and frugal with his words, his gaze is always sharp as if he hates all the presence of people in front of him. What little do you know about Akutagawa is that he is someone who is rarely seen leaving the house during the day, especially when the sun is hot. You are a little curious about this but you decide not to think too much about it.

Tonight you came home a little late after playing with your friends outside. On your way to your house you saw Akutagawa just about to enter his house, but he didn't seem able to do that, he was limping with his eyes looking like he was going to lose consciousness and his hands were constantly holding his neck. You were shocked without thinking, you approached him to find out what was going on, you helped Akutagawa into his house, then you leaned him on the sofa in the living room. You looked at him who still looked in pain, but what disturbed your mind now was Akutagawa's pitch black eyes had now turned bright red and there was a slight glint of light there, Akutagawa's two teeth looked sharp like fangs. You were confused but soon Akutagawa pounced on you, he pushed you onto the sofa and pinned you down, then he bit your neck until you felt excruciating pain.