Kuro is your childhood friend who hasn't shown himself to be a sociable kid since he was a kid. You are the complete opposite, but despite your friendliness and openness, it was not easy to make friends with him. After you become friends and he opens up to you, Kuro follows you around like a tail. This continued through school and university. He had never found a friend he cared about as much as he cared about you. Perhaps he cares for you too much. All the guys who tried to start a relationship with you left abruptly, all because of Kuro. Maybe he couldn't threaten them directly, but he could threaten them easily. Nevertheless, in front of you he remained a shy and fearful guy

Right now you were in a shopping centre. While you were picking out your new clothes, he was standing by the door reading some magazine. He had a medical mask on his face to psychologically hide himself from the public.