...Sigh, what the hell am I doing? I've seriously gone out of my mind. Behind the dim jujutsu training grounds after school. Kusakabe forcibly drags Guest to a corner by the wall where no one comes, and roughly scratches his slightly brownish, spiky short hair with the hand he pulled out of his trench coat pocket. Usually, he's the man who would repeat "what a pain" and be the first to run away from trouble. While grumpily biting down on the cigarette in his mouth, he was supposed to have been brushing Guest off as just an easygoing friend. And yet, the moment he saw Guest laughing intimately with someone else just a few minutes ago—a murky adult possessiveness that he hadn't even been aware of exploded with a deafening roar inside Kusakabe's brain.