Tea's Little Sister ~Mokuba Kaiba~[Book 1]

The prophecy

Meanwhile, everyone was just getting dressed in their suit of armors. But before Lea was about to put on her suit of armor, she heard what Mokuba was telling Adena: To switch outfits so he can go in her place and join his brother. Lea's eyes widened in shock, so she quickly ran over to him and held on to him as she looked at him pleadingly. 
"What are you saying, Mokuba?!" 
"I saw how scared Adena was of going to that Dark Castle, so I asked her to switch outfits with me so I can go there and free my big brother." Mokuba answered, firmly. 
"No, Mokuba. You could get killed! Besides, I should take her place!" Lea protested, desperately. 
Mokuba placed both of his hands on her shoulders and he looked in her eyes as he said more firmly, "No, Lea. You look nothing like her, or me. Besides, you could be killed as well, and I can't let you get killed either." 
"I know, but..." Lea started, before she placed her hands to his chest and buried her face in his chest. 
"I don't wanna lose you again. Ever since Pegasus took your soul back in Duelist Kingdom, I thought that I would lose you forever, and I can't afford to lose you again." She said softly, as she felt tears forming in her eyes. 
Mokuba just looked at her for a moment, then he sighed and lifted Lea's chin up so that they can face each other, and without warning... Mokuba planted a sweet kiss on her lips, which surprised her, but she closed her eyes, not hesitating to kiss back.
After he pulled back, he looked in her eyes and said gently, "Then come with me, and this time, we'll protect each other." 

After the trio had gotten dressed, they had just gotten outside of the castle to join Yugi, Joey, and Mai, who had just finished getting dressed in their suit of armors. There was suddenly a storm, and everyone was shaken. 
"Princess, it's far too dangerous for you out here!" Adena's nursemaid warned Mokuba, as she thought she was talking to Adena. 
"Look! A castle floating in the sky!" Yugi exclaimed, as he saw the Castle of Dark Illusions.
"Oh, dear! Oh, dear! Oh, dear!" Adena's nursemaid exclaimed, fearfully. 
"The Castle of Dark Illusions!" Yugi added. 
"Never mind the castle, look at all those Duel Monsters!" Mai dismissed what Yugi said, as she noticed the Duel Monsters. 
"It looks like they've come to get their offering." Joey commented. 
"The princess!" Yugi breathed, and Lea held on to Mokuba's hand tightly while trembling, prepared for herself and Mokuba to be taken. 
"Get ready, guys!" Yugi warned the others. 
"I've never seen so many Duel Monsters at one time!" Joey remarked. 
"How are we gonna stop em all?!" Mai asked, fearfully. 
"Joey, look out! The Armed Ninja!" Yugi suddenly warned Joey, as he saw the Armed Ninja show up. 
"No way he's laying a hand on the princess!" Joey stated, in determination. 
"We gotta stop him!" Yugi agreed. 
Mai drew her card from the duel disk and said reassuringly, "Leave it to me!" 
Then she summoned her monster, "Dark Witch, attack!" 
Then Dark Witch appeared, and she went to attack all the Duel Monsters that were flying up in the sky. 
"Two down!" Mai stated proudly, as she saw that Dark Witch had destroyed two monsters. 
"This won't work! There are too many to fight one at a time! Listen, Mai, summon back your Dark Witch." Yugi warned Mai, urgently. 
"And then what?" Mai questioned, confusedly.
"We'll have to use another strategy!" Yugi answered. 
"Dark Witch, return!" Mai summoned back her monster. 
"Here's my plan. I'll activate the Dark Hole magic card, and then they'll be lost in its vortex!" Yugi announced, but then a ninja dagger was thrown at the card that Yugi was about to summon, and it shocked the others. 
"Oh no!" Joey exclaimed, exasperated. 
"On the tower, Yugi! The Armed Ninja!" Mai warned, as she pointed up to the tower where the Armed Ninja was standing at. 
"Yeah, look! That no good Armed Ninja destroyed your Dark Hole magic card, Yug!" Joey told Yugi, before the net suddenly fell on to both Mokuba and Lea, and the Armed Ninja pulled the pair up. 
"Princess! Lea!" Yugi cried.
"Don't let him get away!" Mai urged, before Joey drew his card. 
"Axe Raider, use Kunai with Chain to attack!" He commanded, before Axe Raider appeared on the field, then he used his Kunai and the Armed Ninja disappeared just as the net that was carrying Mokuba and Lea dropped.
"All right!" Joey cheered, but then the Whiptail Crow caught the net and began flying away to the Castle of Dark Illusions! 
"The Whiptail Crow got them! They're getting away!" Mai cried. 
"Princess!" Adena's nursemaid cried out. 
"Princess! Adena! Lea!" The others all cried out in unison. 
"Oh no! What have I done?! They've taken Mokuba and Lea! They're gone! Mokuba and Lea are gone!" Adena suddenly spoke up, as her voice was breaking. Then she knelt down in sorrow. 
"Mokuba? What?! You're not Mokuba?! Adena?!" Joey asked, completely surprised that she was Adena! 
"Princess?!" Adena's nursemaid exclaimed. 
"But we thought..." Was all Yugi could manage. 
"So then, they got Mokuba?" Mai questioned. 
"Yes, that was him. He wanted to go. It's all my fault. He was so brave, and I was afraid. Lea tried to stop him but he really wanted to go and he told her to come with him. Don't you see? I was the one meant to be offered, not Mokuba or Lea." Adena explained, as she felt tears forming in her eyes. 
"Please, you must save them!" Adena pleaded. 
"But how do we reach the dark castle?" Joey questioned. 
Yugi sighed, "I don't know."
Then realization hit him as he saw something, "Look, guys! Down there! Ancient ruins!"
"What do you see, Yug?" Joey questioned. 
"They must have been uncovered by the storm!" Yugi answered. 
"That symbol, of the Legendary flying machine!" Adena exclaimed. 
"Wow! So this is where your ancient hero hid it." Yugi commented.
"But even if it's barried under there,  it must be a fossil by now! How can we ever restore it?" Joey asked. 
"I don't know, but it's our only hope of rescuing the Kaiba brothers and Lea. Let's go down there and check it out!" Yugi commanded, before he, Joey, and Mai ran down to examine the symbol.