This is a Prince of Tennis fanfiction. A FujixOC one, in fact. A small gift for lil-tulip,

I actually had lil-tulip's permission to write this fan fiction, because it's about her fan fiction. Funny, huh? This is a sort of in-betweener. It comes after lil-tulip's fic 'Smiling Concerto', and a little into her second fic 'Tezuka's Feeling'. You want to know how things developed between the two main characters? Read her 'Smiling Concerto'. It's quite fun, I thought. You don't have to do so to understand the events here, but it does help you get the mood and emotions involved sometimes.

Note that Fuji's character has become the way it is here because of the events in 'Smiling Concerto'. So he sometimes says or does things that he would not if he hadn't met the current heroine. Although I will try to keep him in character regardless.

Disclaimer: The only character I own in this fic is Serena. Rin, Yuki, Tennosuke and Ryo are lil-tulip's.

One-Hundred Percent Tensai1

Anger…was a many-splendid thing. It gave you the strength to break up with your beloved and cherished boyfriend once he cheated on you. She hadn't got around to it, but she would! And back there Rin thought 'once' because she realized such a guy would ultimately break a woman's heart. No matter that that same guy had confessed undying love and affection to a certain girl. And not too long ago either!

She could scarcely believe it! Her Fuji Syusuke kissing someone else…right smack in the middle of the school hallway. Where everyone saw! Except her. She'd been off early for her piano practice, clueless as a pigeon. But that sort of scandal got around, especially when involving one of the school's most popular jocks.

She had pictures, damn it! And when she'd waved them in front of his face yesterday he'd only stared at her in shock and increasing guilt. Stared mutely with those big, slanted, beautiful azure eyes that begged for her to understand…Even then she was ready to drown within them. A swift kick in the butt courtesy of herself helped her snap out of it though, because she couldn't let him get away with it just because she loved him! Cheating was not something she'd ever understand.

The worst of it was…he hadn't denied a single one of her furious accusations. She suspected he had a reason. A good one. For everything. That girl had been there when she'd faced him with the kissing thing. Her rival was –unfortunately- darn pretty herself and fragile-looking. Maybe she was dying and being with Fuji was her final wish? And maybe Rin would be sprouting a rhinoceros from her backside during lunch.

But…knowing Fuji she probably guessed right the first time. Or at least was close to the mark. Fuji would never hurt her on purpose. That didn't mean she wasn't beating him shitless for not explaining things!

"Eiji! Where is he?"

In a powerful choke-hold, the bouncing redhead could only gurgle and choke out a "dunno, I swear!"

"Rin-chan, please calm down! None of us know where he is," Oishi rushed in, trying to dislodge the hands circling his friend's neck. "He did talk to Eiji last, but it was only about the new equipment!" Everyone, including Tezuka, was staring on at the scene. And the only reason Tezuka did not interfere was because there was little he could do. And practice was over so he didn't even have to risk it.

"Why are you upset? You're not married to Fuji-senpai, so it's normal for you to break up eventually."

A big, harmonious gasp, and then utter silence. Everyone stared between a frozen Rin –who finally dropped the swirly-eyed acrobat- and an unsuspecting, too-honest-for-his-own-good Kaidou. Who stood sipping from his water bottle and staring at the girl silently. "What?"

She hurled at him so fast he only had time to look horror-struck.

"Wow. Glad I wasn't stupid enough to say something like that," Momo whispered to Inui from the sidelines as both watched Kaidou being pummeled. Girls were a terror when scorned. But indeed, what was Fuji doing with that Serena girl? Momo had been so sure he and Rin were forever. Something was up and Rin seemed to know it, or she'd have bowed out from the first.

"You know where he went, Inui?"

"He went on a date with Serena-chan. To X restaurant."

Momo turned in alarm to Rin, not expecting Inui to relay the information so loudly –and probably on purpose. Rin had dropped Kaidou and was staring in their direction. She looked stricken. "He can't do that! That's our spot!" she cried indignantly, bounding to her feet. The place they had their first date, and every anniversary date thereof. It was theirs, and there was no excuse for his taking that girl there of all places! None!

Fuji Syusuke…her first love, her most potent muse…was about to meet a terrible end.

"Bless you," Serena said softly, handing him her handkerchief.

Fuji waved his hand at her and shook his head, rubbing his nose. "Thank you, I'm fine."

She smiled brightly at him, honey-brown curls bouncing as she turned to put the thing back in her purse. "Maybe you're coming down with something. Ever since we started going out, you haven't been looking well."

He looked at her blindly for a moment and then his eyes closed in one of his customary smiles. "It's nothing serious." But it wasn't an illness at all. Serena and he both knew it.

"Ok." She looked down at their shared glass of chocolate smoothie. "Aren't you going to drink with me? I can't finish this."

"Mn. Just give me a minute. I'm still full from the burgers."

Serena pouted suddenly. "You're not being very cooperative, Fuji-chan. Drinking together is one of the things I really want to do with you."

The door to the café tinkled as someone entered. Fuji wouldn't have paid the sound any mind…but the strange aura that followed…

He glanced there, his head resting on his hand. He was sitting straight before long, his eyes open. "Rin!"

Serena frowned at the familiar use of that name and followed his line of vision. A girl who looked at the verge of spontaneous combustion stood at the entrance to the café. She was panting and looking in their direction.

For Rin, the first thing she saw was those two sitting together. And then her eyes fixed on the table. Two straws. Two straws in a big glass of smoothie. Two straws in a big glass of smoothie sitting right in the middle of the table. Final conclusion: A glass of smoothie for two.

It was official. Fuji was on a date-date!

A strange orange hue colored her vision, which meant she was mad, but not mad enough to destroy the place. She walked to the table and stared straight at Fuji, ignoring the other occupant of said table. She knew he could see how furious with him she was; he was staring at her, his unique eyes wide and apprehensive.

"Who are you?" the pretty green-eyed girl demanded, and was effectively ignored. Rin only turned to the big glass of smoothie and picked it up. "Hey! That's ours!" the same girl cried, but didn't dare take the glass back.

Rin looked at Fuji, who looked at her silently, expecting what was to come. And clearly accepting of it.

She raised the glass and took a deep breath, and Fuji narrowed his eyes. They snapped wide open again as Rin raised the glass to her lips and proceeded to gulp down its contents noisily.

"Ha!" she cried victoriously and slammed the empty cup down on the table, making everyone in the café jump. She wiped her mouth with the back of her sleeve, glaring at the boy looking back at her so intensely. She turned and marched off, not caring that everyone was staring.

"Rin," he called in that smooth voice of his and she almost broke down in tears. She didn't want to hear his voice. She especially didn't want to hear it telling her- "I'm sorry, Rin. Understand," he added in a near-hiss.

There was a message there, she could tell. But she didn't want to bother figuring it out. Not when her boyfriend –ex-boyfriend- was sitting at their table, in their café, drinking with someone else from one glass so intimately.

"Oh," she said in an afterthought at the door and spun about. In the back of her mind she thought that it felt oddly soothing to have made this pretty girl gape at her in such shock. She'd left an impression on the little tramp at least! "This is yours." And she hurled the small object at the boy she still loved.

Fuji caught it deftly and watched helplessly as the door tinkled a little harshly. He looked down at his hand and grit his teeth angrily, his free hand tightening into a fist…but otherwise his face remained smooth and unaffected.

Serena only stared at him in annoyance. "I told you to break up with her, didn't I? I knew something like this would happen again if you didn't."

Fuji looked back at her without really seeing. "I was waiting for the right moment. Are you all right?" he said in an afterthought, sitting back down. He looked down at the key-chain plushy: a smiling cactus he'd given Rin as a gift after they'd gotten together. She'd loved it, hung it on her schoolbag. 'Fuji is Mine' was still written clearly inside the grinning mouth. It was meant as a joke, and a way to tease him whenever a girl stared at him too long.

He noticed Serena looking at him suspiciously and put his smile back on, slipping his gift into his pocket. Her smile returned as well.

"It's cute. Can I have it?"

He looked at her in surprise. "What?"

"The key-chain she gave you. You don't need it, right? Can I have it?" She fluttered her eyelashes at him and pouted sweetly. "I really want it."

He took too long to answer and she frowned. But smiled happily again when he dropped it in her open palm. "Thank you! I'll cherish it."

"Mn."

Serena watched in veiled annoyance as the intense look returned to the boy's features. Was that girl so important? If she didn't get rid of her soon she wouldn't be able to get Fuji's full attention.

The next day was terrible. Already Rin had had a fitful, sleepless night, and waking up to find her favorite key-chain swinging from another girl's schoolbag…Let's just say it was devastating and maddening. Did Fuji want to die? If he'd been trying to be kind to a sickly girl alone he wouldn't have avoided -even ignored- Rin's existence. He wouldn't have given away her cactus to that Serena.

Something was up. But no matter his reasons, Rin was going to make him suffer. She cackled evilly, ignoring the shocked stares from the other students in the hallway. Arriving at her destination, she slid the door open and walked in. "Eiji-kun!"

"Geh!" Surrounded by a group of his friends, the redhead looked appalled before proceeding to dive under his desk.

Rin sighed and walked to his place. Poor Eiji. She'd almost killed him that time, no wonder he was hiding…"I'm sorry, Eiji. I lost my head back there. Please come out. I'm not mad at you."

The chipper, cowering boy gazed over the top of his desk at her suspiciously. "N-nyah. What do you want?"

"I wanted to apologize. And ask you some things." She smiled at him innocently. "It's OK if you don't know. I just wanted to ask."

"Nyah! If it's about Fujiko, then I don't know anything! He just started dating that girl suddenly and-" He started in horror as flames of fury practically leapt around the angry female. And then she forced herself to calm.

"Is that all?"

Eiji nodded mutely, not daring to say another word.

"All right. Thanks, Eiji…I really am sorry. I'll make it up to you as soon as I know what's going on." She blew him a kiss and headed out. The boy stared after her, as did the rest of the class.

"Inui probably knows," he piped up suddenly, giving a small grin as Rin's shocked look turned into a grateful smile.

To Be Continued…

R&R! It would be ever so energizing XD Plenty of twists and turns to come, because I'm just evil that way. Bwaha! Criticism and comments appreciated.