DISCLAIMER: I do not own Baka and Test, also do not own Gintama (should any references appear).
It was very early in the morning, much earlier than he usually woke up, but Hideyoshi was already awake. He sat on the edge of his sister's bed, his entire body trembling. He would have already left her room, but he could barely stand let alone keep his balance. Besides that, he was also dreadfully tired to the point where he could just pass out if he wasn't feeling the need to get away.
His mind was yelling at him to get away while he could, but his body wouldn't - no, rather his body couldn't listen to his mind. Hideyoshi could see the open door on the other of the room and he was yearning so much to go through it, to escape. He was exhausted and so very terrified, but no matter how scared he was, he couldn't muster up the strength to even move from the bed.
"Hideyoshi?" He froze, the blood in his body chilling as he heard his sister speak to him in her sleepy voice. "What are you doing in here so early...? There aren't any storms tonight, so go back to bed... will you...? I'm... I'm tired..."
Hideyoshi slowly turned his head to look at his sister, confusion joining place with exhaustion and fright. His sister looked so innocent - in complete contrast to what had occurred that night - as she quickly drifted back into slumber, seemingly oblivious to what she had done. A realization slowly dawned on him despite the exhaustion and terror hanging over him. His sister didn't remember any of what had occurred, not one single moment; otherwise, her voice and choice of words would have been quite different.
Hideyoshi couldn't let her remember... She had been intoxicated, it wasn't her fault... It wasn't her fault; but still... he was so terrified of her, his mind still telling him to run while she was asleep but...
He couldn't let her remember. He had to make sure she didn't remember, otherwise... she wouldn't be able to live with herself...
Hideyoshi forced himself up onto his feet, knowing what he had to do and hoping that she wouldn't wake up in the process.