Chao- Meh heh, who knew that biology could be so useful and interesting?

Disclaimer: DarkChao1663 does not own Yu-Gi-Oh! or any of the characters. All ideas and characters belong to Kazuki Takahashi.

Warnings: None

Pairings: None

"Talking."

"Thinking."

/Yami and Yugi mind link./

Chapter 1: The Term "Host" Defined

A young teen with tri-color hair sat on a bench and ate some sushi while talking with a friend.

/Ah! Such a nice day, isn't it?/ Yugi asked with a huge grin on his face.

/Yes, it's much clearer now after a few days of rain./ Yami replied, /So, you now choose to spend a sunny day at the amusement park?/

/Yup,/ Yugi said as he stood up and threw away his trash in a garbage can. He looked up as the clouds slowly moved along passed the sun. A gentle breeze flew by and Yugi couldn't help but smile.

/What do you all plan to do?/ Yami asked.

/Oh, you know, just ride a few rides and play a few arcade games./ Yugi answered, /It'll be a nice way to start off a weekend after working so hard in school. And the best part is: no homework!/

Yami chuckled at the last statement his partner made.

"Hey, Yugi!" one of the boy's friends called out. The young teen turned around and saw a girl with short brown hair and ocean blue eyes.

"Hey, Tea." Yugi greeted back.

"What are you up to?" she asked with a smile.

"Nothing, just talking with Yami." Yugi answered.

"What's up, everyone?" Tristan asked as he joined his group of friends.

"Hey, Tristan." Yugi said.

"Where's Joey?" Tea asked as she noticed the absent of their blonde friend, "Wasn't he coming with you?"

"Yeah, but I went ahead and left without him. After all, this is payback for him stealing my blueberry off of my place when I asked him not to as I was saving it!" Tristan replied.

"Will either of you two grow up?" Tea sighed. At that moment, the group saw Joey running towards them.

"Sorry… I'm late… guys…" he panted. He then shot his head up and yelled, "I would've been hear earlier if Tristan told me when he was leaving!"

"This what I call sweet revenge!" Tristan claimed with a grin of triumph.

"Oh, really?" Joey asked in an annoyed tone.

"Yeah, really!" Tristan answered.

"Come on, Yugi," Tea grumbled as he grabbed her childhood friend's risk, "Let's go ahead and leave without them."

Yugi laughed and nodded. The two boys who were left behind realized their two friends had left. They pleaded at the same time, "Wait! Don't leave without us!"

Domino City Amusement Park was packed with children and adults, but mainly with teens. Lines for each ride were very long but worth the wait. The food was filled with calories but no one really cared. There were many other children and teens attempting to break previous held records at the arcade.

"That was so much fun!" Joey exclaimed as they exit a rollercoaster ride.

"Which one should we go on next?" Tristan asked as everyone looked around to see where they wanted to go.

"Hey, another rollercoaster!" Tea pointed, "Let's go there!"

"OK!" everyone agreed. As they approached the next ride, the group was stopped when an attendant had asked, "Excuse me, but this kid right here needs to be measured."

"Hey!" Yugi protested in annoyance, "I'm not a kid! I'm in high school!"

The boy could hear his friends snickering behind his back which made him even more frustrated.

"Err… Sorry, sir; company policy," the attendant explained. Yugi sighed and placed his back against the wall. He waited anxiously as the ride attendant looked to see where the line was in comparison to said high school student.

"Sorry sir, but you're only a few inches short to riding this ride."

"What!" everyone complained.

"Can't you let this one slide?" Joey asked getting annoyed.

"Err… Sorry, but if I do then I might lose my job!" The ride attendant explained getting nervous. Yugi sighed and said, "It's ok, everyone. I'll just wait for you all to get back." The young adolescent did not want to be responsible for having someone lose their job because of him.

"But Yugi." Tea protested.

"It's ok; I won't be alone." Yugi smiled and pointed to his puzzle that he wore around his neck. He then walked away from the line and sat on a bench. Unhappily, he swung his feet as he waited for his friends to finish the ride. He knew he was missing out on a fun time, but there was nothing he could do about it.

/Something wrong?/ Yami asked with concern as he appeared next to Yugi.

/No,/ Yugi answered, /But it does get annoying and sometimes I wish I could be taller./

/Taller like Joey or Tristan?/

/Maybe; I'm not sure if that'd be too tall./

/Perhaps a height Tea or Rebecca Hawkins would find acceptable?/

"Y-Yami!" Yugi protested as his face grew red.

/What? I'm just asking./ Yami tried to explain. Yugi turned his head away from his darker half as he pouted. Yami couldn't help but chuckled as his partner was behaving in a childish manner. He then decided to changed the subject, /What's next on the list of things to do today?/

Before Yugi could answer, he saw his friends coming his way. He smiled and asked, "How was the ride?"

"We didn't go on." Tristan informed his buddy.

"Why not?" Yugi asked in confusion.

"We didn't want to ride without you." Tea explained. The small teen felt his heart leap with joy as he heard his friends sacrificed having a good time to be with their vertically challenged friend.

"But…" Yugi also felt guilty as he assumed that he was brining them down.

"There are other rides and games we can all go on." Joey reminded, "Let's go find them!"

"Yeah!" everyone agreed.

Yugi smiled as he followed his friends to find other outings to enjoy. They had gone on bumper cars, into a hallway of mirrors, a smaller rollercoaster, and a machine that took people up and down really fast. Later on in the day, everyone sat down to have a bit to eat.

There was a ketchup fight between Joey and Tristan which got out of hand. Tea and Yugi tried to ignore it but before the boy could take a bite of his hamburger, he found his face covered in ketchup. There was a moment pause as everyone looked at the young teen who has a surprised expression on his face.

"Err… Sorry, Yugi," the two boys apologized. Yugi and Yami couldn't help but laugh.

"It's all right, I'll just go wash this off," Yugi insisted as he placed his burger on his plate and excused himself to the bathroom.

As he walked away, Yugi could hear Tea scolding the two childish teens once more. Once in the bathroom, the adolescent washed his face in the sink and was able to get rid of the stains before they set on to his clothes.

/Will those two ever agree on anything?/ Yami asked as he reappeared to his partner's side.

/Who knows,/ Yugi replied as he grabbed a paper towel to dry his face from the water the dripped off his bangs. As he tossed away the used towel, he noticed his yami looking at him.

/What? Is there anymore ketchup on my face?/ he questioned. The spirit shook his head and said, /No, it's nothing./

Yugi began to worry so he asked, /Aren't you having a good time, too? I know it can be a little boring having to stay within the Puzzle./

Yami smiled and replied, /Of course I'm having fun. I'm just enjoying the fact that you're enjoying time with your friends./

Yugi walked out the bathroom feeling a little guilty for having a good time with friends and appreciating all what the amusement park had to offer, with the exception some rides were off limits due to height. He wanted his school buddies to be able to have fun without having to worry about him having his feelings hurt.

Just then, an idea hit the young teen. He smiled as he walked back to his group of companions. Everyone was looking at a map to see what to do next.

"Hey," Yugi greeted as he returned from the wash room.

"Hey, Yug." Joey greeted back.

"I think I've found a way for everyone to enjoy all the rides. Even that one rollercoaster I'm too short for." Yugi announced.

"Really? How?" everyone asked with enthusiasm. Yugi winked and beckoned his friends to follow him. They walked down the path to the ride that had rejected the vertically challenged.

"Here we are," observed Tristan.

"And we go." Yugi said as his puzzle began to glow. After a flash of light, a very confused Yami stood where the young teen once stood.

"What?" Yami asked in disbelief, "Why am I out here?"

The group smiled as they understood their friend's plan.

"You're going on the ride with us!" Tea informed the former pharaoh as she grabbed his arm.

"Let's get on!" Joey said.

/Err… Yugi?/ Yami asked his partner.

/It's ok. This way I can ride it, too./ Yugi smiled. Yami smiled back, /Well, if you're fine with it./

The rest of the time went by smoothly. Everyone was able to enjoy all the rides regardless of the height issue. At the end of the day, Yugi took control as the group had fun on the last ride, a Ferris wheel. The view was magnificent at the top.

There, everyone could see the roofs of houses and buildings, clouds passing by, and people finding their way to their next destination. When the wheel came to an end, everyone stepped down and departed for the day. Yugi walked home with the spirit of the puzzle by his side.

/Whew! That was a lot of fun!/ Yugi exclaimed.

/Yes, it was./ Yami agreed.

/Did you have fun on the rides?/ Yugi asked.

/Yes, I did. I hope we will be able to do that all again soon./ Yami replied.

/Me too./ Yugi smiled.

Xxx

Sunday came and went and Monday had arrived. The first day of the week for many students involved gathered their school supplies together in a giant rush in an attempt to not be late.

"Yugi!" called out the adolescent's grandpa, "Did you eat breakfast yet?"

"No," the boy answered, "I need to get to school!"

The young adult headed out the door and was on his way to Domino High School.

"I'm not really that hungry," he thought to himself. The teen didn't mind attending school; he was able to see and hang out with his friends. But, Yugi was still a student and had classes he dreaded.

"Ugh, biology is first hour." Yugi thought to himself as he got off the bus and headed towards school.

/Is that the class with the strict teacher?/ Yami asked as he appeared.

/Yup,/ Yugi confirmed, /Some things can be interesting, but if she wasn't so stern I'm sure the class would move along nicely./

Yugi entered his classroom and saw Tea ready for the lesson to begin.

"Hey, Tea," the teen greeted, "How was your Sunday?"

"It was ok." she responded, "How was yours?"

"The usual." the adolescent replied as he took his seat next to her.

The bell rang symbolizing that class had began. A stern-looking teacher came into her room. She started class by stating, "I'm sure none of your read the newspaper since you're all too busy playing your games and watching TV. But, I'm sure this will draw your attention."

She uploaded a newspaper article on a Smart Board. The headlines read some of the food stands around Domino Amusement Park were closed due to health violations. None of the students gasped because they did not really cared. The teacher expected this type of attitude, so she said, "That's why we're going over the chapters of what a 'host' is and how it can be harmed when attacked by a parasite."

She pulled up a PowerPoint presentation and explained, "In biology, a host is an organism that harbors a parasite by providing nourishment and shelter. A parasite is an organism that lives on or the inside another organism to survive."

As she showed pictures of parasites, some of the students protested, mainly the girls, by saying how disgusting some of them looked. Tea whispered, "Eek! I'm glad I don't have anything like that in my body!"

Yugi laughed and agreed, "I wouldn't want to be a host to something like that!"

The teacher quiet down her class with the threat of giving detentions and continued on with the lesson. Deep within Yugi's Puzzle, the lecture was being heard by a spirit was captured by the lecture, pictures, but mainly the vocabulary words.

After class, Yugi and Tea departed as they headed towards their next class. The small teen stopped by his locker to exchange textbooks.

/See Yami, the lesson was interesting but the teacher sure was mean!/ Yugi chuckled. He waited a moment but he did not hear a reply from his friend, /Yami? Were you listening in on the lecture or did you just stay in the Puzzle?/

Still, Yugi did not hear anything from within.

/Yami?/ Yugi asked as he clutched his pendent.

"Hey, Yug," Joey greeted, "You ready for the next class?"

"Sure," Yugi answered, "Let's go."

The two walked to their next period together. Yugi couldn't help but wonder why he was not getting any response from the upside down gold pyramid.

xxx

The group of friends gathered around outside under a shady tree and opened their lunches.

"Man, Saturday sure was fun!" Tristan said making conversation.

"Yes, we have to do that again really soon." Tea agreed.

"Should we go to the same place or somewhere different?" Joey asked as they all wondered about making plans for the weekend.

Yugi was half-listening, but he did not eat. For some reason, his stomach has been bothering him all day Sunday and today. He was, however, more worried about whether or not something was bothering his darker half.

"Is something wrong, Yugi?" Tea asked as she broke through her friend's thoughts.

"Oh… no," Yugi answered.

"You sure? You haven't even open your bag," Tristan observed.

"Or are you just as grossed out as I am about what happen in biology?" Tea asked teasing her friend. Yugi only laughed.

"Ick, are you all talking about those nasty photos of those worms?" Joey asked in disgusted.

"Yeah, we saw them in our first hour class." Tea informed.

"We heard about that from Ryou and Duke who took the same class," Joey said.

"I wonder if half the stuff we learn at school is legal?" Tristan asked jokingly.

The bell rang once more signifying lunch was over. When Yugi began to stand up, he felt a sharp pain in his lower abdominal. He grasp his diaphragm with his hand and gasped in agony.

"Yugi, are you ok?" Tea asked. Her friend was about to speak, but the discomfort he had felt went away.

"Yeah," the small teen answered, "I'm fine."

Everyone then walked towards their next class.

xxx

Yugi departed from everyone after saying his goodbyes for the day. As he walked home, he tried to call for the spirit once more.

/Yami? Are you there?/ Still the teen did not get any response from his friend. He had tried several times between classes to talk with his darker half, but it was no use.

"Is something bothering him?" Yugi thought to himself as he went inside his home. "Maybe I should let him be."

Yugi greeted his grandpa and then went upstairs to take a shower. When he was done, the boy went to his room and began to do his homework for the day.

"Argh! Lousy school work," he complained as he took out his big textbook full of giant words that made sense to no one. He was halfway done when he heard his name being called, "Yugi! Dinner is ready!"

"I'm not at all hungry." Yugi thought to himself as he got up from his chair. As he did, he felt another sharp pain coming from his abdominal. He reached for the same place as before and gasped in pain. He used his other hand to help support his body by firmly placing it against the top of his desk. He started to wheeze as the pain slowly went away. At that moment, there was a knock at the door.

"Yugi? Are you coming down?" Solomon asked.

"Err… No, I'm not hungry." Yugi informed as he straighten himself up gradually. Yugi's door open and the elderly man questioned, "You didn't anything at all yesterday, did you?"

Yugi leaned against his desk and shook his head.

"You also didn't eat breakfast this morning, but what about lunch?" he asked becoming worried. Again, Yugi shook his head, "I… wasn't feeling hungry."

"Are you getting sick?" Yugi's grandpa asked as he placed one hand on his grandson's forehead.

"No, I don't think so." Yugi answered. The elderly man started to leave and before he exit, he said, "If you feel sick then don't go to school tomorrow."

The teen nodded his head. Once the door was shut, he sat on his bed with both arms wrapped around his stomach. Nearby that area, he could feel small amounts of throbbing pain. Suddenly, the boy felt something coming up. He knew his stomach was not cooperating so he reached for his trash can and started to vomit.

Before inducing another set of bile, he stopped for a moment and whimpered, "Ya… mi."

To be continued….

Chao- Yay!

YChao- So, the people who have taken or are taking biology should enjoy this story?

Chao- Who knows? Most likely!

Yugi- Why me?

YChao- Because the story makes more sense with it being you!

Chao- If you read then please review!