Ayumi's acknowledgement of the surroundings didn't come into affect until the door clanked loudly, and they were sealed in an abandoned building. Her eyes widened, tears pricking at the corner of them.

On the floor she was trembling in utter panic. Questions that hadn't entered her mind at first began to hit her at a break-neck speed. Why was he doing this? What the hell is wrong with him? Why is he smiling? Where are they? What was going to happen? Was he the killer? Was this really how she was going to die? Why didn't she tell Mayu the truth? Her reaction, once she realized she was no longer bound by his hands, was to scramble back as far from him as possible. She flinched as her back hit a wall. She looked around quickly, no escape route making itself clear. Her breathing was being thrown off, her heart constricting in her chest. She looked up at the man in horror. He was... a senior... at Kisaragi... For a brief moment, she wondered if this was a disgusting prank, but anyone could see that the insanity in his eyes was sincere. "W-what the hell is this!?" she yelled at him. Maybe she should have remained silent, but she needed to know what was happening.

Yuuya was amused with her expression of terror. He loved that look... Even as she yelled, seemingly trying to demand an answer, the fear was evident in her eyes. He knew... He had an acute sense of the delicious emotion. Well, despite her having no control of her surroundings, he figured he'd humor her by answering her specific question. "This is my hobby," he answered with a twisted smirk, his dark eyes narrowing at her. He took slow, but long, strides towards towards her, his heavy steps resounding all around. He knelled down near her, eyes analyzing her. He seemed to only get more amused. "But... you're a different case...," he explained, placing his hand gently against her cheek before pushing her chin up so she was in his direct line of sight. "My little sister," he seemed to purr, his hand moving from her face to move through her hair, "So precious... You won't be killed... Yet, at least." He paused, his hand stationary against her hair before retreating, and he stood to loom over her with a menacing look. "Little sister has a special seat to watch my hobby... Don't you feel honored?" he asked with a small tilt of his head. He may have looked relaxed, but his eyes were dead set on her, and his body was ready to deter any attempt to run.

Ayumi felt like she was in between stomach-twisting nausea and an uncontrollable panic attack as he answered her. He was the killer, then? Even without blood or a weapon in sight, there was something in the core of her being that made her wholly aware that there was something very twisted and dark inside of this person. She shrank back at his approach, the wall keeping her prisoner to the spot she crawled into. The clap of his shoes against the old floors made her stomach drop further and further. She wasn't ready to die! A small sound of terror escaped her as he knelled in front of her. She wanted to disappear at that moment. Just melt out of existence. She flinched as his hand made contact with her cheek before forcing her chin up to make her meet his eyes. Her jaw clenched as he began to explain her being a 'different case.' Her eyes were welling with tears of unadulterated fear. Her mind had another moment of complete blankness at the words that followed. 'Little... sister...?' She felt a rush of disgust crawling under her skin like maggots as his hand moved through her hair in what she assumed was meant to be affectionate but only made her sick. It seemed like... a sick, perverted fantasy or something. The news of her death being postponed couldn't lessen the weight of panic on her shoulders. How the hell was she supposed to absorb all of this!? An upperclassmen is keeping her hostage to pretend she's his little sister so she can watch as he- Her hands grabbed one another tightly. Her breathing was erratic as he retreated from her. Even with his claims that she would be living a bit longer, the fear of death at any moment was looming over her head. He was intimidating with broad shoulders and the height to loom over her, even if she had been standing. He could kill her with his bare hands if he so decided. It was the rawest emotion she's ever felt in that moment. The closeness of death and the helplessness that she couldn't do anything. Her eyes shifted to finally look up at him, a resounding 'no' in her head at his question. She wasn't honored. This was a curse. Though, with everything he was saying, she could only find it in herself to respond one way. "I'm not your little sister," she told him with as leveled a voice as she could manage, her eyes set on his. She was Hinoe's little sister. That was the only person in the world allowed to use that title with her.

Yuuya watched with satisfaction as she took in her whole situation. But when she spoke, her tone was still irritatingly level... Well, that would change within time. His smile disappeared at her comment, his eyes glued onto her with malice, though his prior insane expression came back in a snap. "But you are... A darling little sister, who's mine and mine alone," he corrected her with a strong voice, beating down any say she had in the matter. "A precious little sister that should follow the rules... unless she wants to get punished," he informed with a consistent joyful tone. He wanted to show her what he could do today, but he needed a new victim... Maybe he could get one tonight, bring them here, and then start tomorrow... That sounded good.

Ayumi's entire body tensed as his expression shifted to a crueler nature. It was gone in a moment, but the memory would burn itself into her brain. She realized that she may not want to push him, given the fact he was completely unstable, yet she could hardly imagine letting herself play this role. Each time he called her 'little sister', an awful chill was rattled down her spine. She hated him with an intensity she's never felt before. The joyful way he spoke about the twisted game he was playing... It was disgusting. She moved to try and stand up, but her legs were trembling too much to support any weight so she was stuck on the ground. It didn't matter... she couldn't run. She just didn't want to lie down and accept all this either. She wasn't his sister. "No! I'm not! I'm not your little sister, you twisted bastard!" she yelled, the control over her voice in shambles. Their was a lump in her throat as she fought back tears. "I'm not your's," she added with a cry. She couldn't play along with this. She refused.

Yuuya didn't change his expression as she spoke out in protest, though he did enjoy her eyes on the verge of tears. He got back down on his knees and grabbed her by the hair, a lot more of a violent motion than the affectionate one than before. There was a crazed look in his wide eyes, his smile unwavering. "Little sisters should know that big brothers are in charge... If you don't do as told, it'll only get worse," he told her as he tugged her up by her hair to be at eye level with him.

Ayumi felt herself began to shrink back down as he moved back down to his knees. A small whimper escaped her throat as he roughly handled her by her hair. She cringed at his voice, her stomach dropping as she wondered exactly what he would end up demanding of her. Her head hurt at the forceful yanking, but she realized that he could hurt her much worse. Her eyes shifted down to the ground, unable to reply. Any words that came out would be venomous, which would only lead to pain. If this went on long... maybe someone would find this place and her before it was too late.

Yuuya examined her features a moment, coming to the conclusion she had nothing more to say... She would learn eventually, that she should be a good little sister if she wanted to live. He pushed her back to the ground and stood back up, staring down at her for a second. "... You'll learn with time." He turned, picking up some chains that were to the side, but he kept a careful watch on her. He walked over, dropping the heavy restraints to the ground before squatting back down in front of her. One hand gathered up both of hers, while one knee held down her legs. "You didn't bring anything, did you? If so, I'll have to confiscate your possessions," he said with a dark look, raising his other hand to search her for anything. His hand explored the entirety of her uniform, pulling from her pockets her cellphone, keys, and other such things. He removed her hair ties as well, just to be safe, then thoroughly searched through her hair for bobby pins. She seemed clean now... He placed the items to the side, grabbing the chains with one hand while his other grabbed her wrist, then roughly jerked her up to stand. Whether she had gotten to her feet or not, he moved her over to a dark area of the floor, near the middle, where a structure pole stood. He pulled her hand down, chaining her wrist to the pole with multiple circles around them, then locked them together with a combination lock. He jerked at her arm, to make sure her hand was secure, not really caring the damage it did. Seemed stable... He was confident in his work, so he stood and backed up. "I don't have another friend to resume my hobby with today... so you'll just stay here alone until tonight. The fun won't really start until tomorrow, but at least you can get to know our visitor," he told her, walking over to where she had once sat and picked up the items he had pulled from her. "I'm leaving you with one hand to do whatever you will with it... Like, eat, when I bring you something, other things of that nature, and... Well, you get the idea," he explained, guessing she was confused why he had only locked up one of her hands. He turned and walked slowly to the door, glancing to one of the large cracked windows, seeing the sunset past the treeline. "Winter's coming... It'll be dark sooner than normal, huh?" he commented somewhat randomly, before casting Ayumi a look with a large grin, "I'll be back later... Try not to get too lonely." With that, he left, shutting the heavy door behind him and leaving Ayumi in the deathly quiet abandoned building.

Ayumi wanted to tell him to piss off as he assured her she would learn. What did he want? For her to call him 'Big Brother' and play the cutesy little sister act? She really wasn't sure what he wanted from her, but she knew no matter how the role was supposed to play out, she didn't want to do it. She watched as he grabbed chains, her stomach twisting with horrible anxiety. She should have realized he wouldn't just trap her in a room to sit as she wanted. He would want more insurance to make sure she didn't escape. Ayumi stiffened as he came back over to her. Her breath hitched uneasily as he held her down. She didn't even have a moment to answer his questions as his hand began to search her. It was disgusting, even if it wasn't sexual. The contact made her nauseated, and the fact he felt like he had the freedom to examine wherever he wanted pissed her off. She watched her cell phone, her last connection to the world, was taken away. Should she have tried to call someone in that frantic second? He would've probably broken her hand if she tried... but... still, she felt regret burn that she didn't think to try. She watched him rid her of everything she had in possession. She hardly had a moment to reflect before she was jerked onto her legs. The roughness shot pains through her arms, her legs taking longer than they should to relearn how to walk. They were by a pole a moment later. She watched helplessly as her wrist was connected to the pole by heavy chains. She gasped in pain as he jerked her arm, the metal clanking painfully against the bone of her wrist. She felt tears horribly close, but she didn't want him to see them. Her breathing was ragged as she looked up at him. 'A-another friend?' she thought in confusion. Then it hit her. He would still kill people, even if she was here. She was fulfilling some role as his little sister, for whatever reason... but, a killer still needed to kill. The tears became that much harder to fight back. She could hardly focus on his explanation on why he allowed her a free hand. She perked in panicked alert as he moved towards the door, catching his odd comment about winter. His grin wiped away confusion with more heart-clenching fear. The heavy door that shut behind him rattled her bones. She tried to gain some control on her breathing. She looked around the abandoned room, coated in lost time. She looked solemnly at her chained wrist and the pole to which it was attached with. The silence was only broken by her own uneven pants that eventually gave way to body-wracking sobs.

Much later, when the building was pitch black except for the moonlit shape of the windows, the door clanked open again. There were those heavy steps, but there was also another noise... A dragging sort of noise. Yuuya came into sight once his head, and eyes, were lit up by the moon, his look more blank and resembling the one he normally wore at school. He bent down near Ayumi, dragging whatever he had in hand closer. There was more clanking of chains, then the click of a lock. He stood and backed up, his smile reappearing. "Play nice," he said in a quiet hum, turning to leave again. Tomorrow, it'd really get exciting... Not only would he have the pain of his victim, but the pain of his little sister as well.

Ayumi wished she could just fall into a permanent sleep, but the emotions coursing through her left her high-strung. Her sobbing eventually had died away into thick silence. That was broken by the loud door announcing this man's return. She tensed, her puffy red eyes trying to make out the shapes. It was difficult in the darkness, though her eyes had adjusted over time to allow her a somewhat decent sight. His blank expression was just as unnerving as his crazy ones... Her eyes narrowed slightly at his couple of words before he was gone again. She looked over to see the person who had been made prisoner along side of her. Her throat tightened as she stared for a moment, the heaviness of everything happening weighing down on her. Someone had to find them. This couldn't actually be happening to her.