Summary: First-year Hogwarts student Harry Potter is constantly outwitted by his classmate Daphne Greengrass, a sly Slytherin who loves to tease him. No matter how hard Harry tries to get back at her, Daphne is always one step ahead. Inspired by the series Teasing Master Takagi-san.

AN: This idea has been bouncing around in my head for days, and I just had to write it down. I hope you enjoy!

The day had finally arrived.

Steam billowed from the scarlet engine of the Hogwarts Express, mingling with the excited chatter of families and the hooting of owls in their cages. Platform 9¾ was a whirlwind of activity, with witches and wizards loading trunks and saying their goodbyes. Harry's heart raced as he stood amongst the bustling crowd, his green eyes scanning the platform for glimpses of his future classmates.

James and Lily Potter stood beside him, their pride evident. James ruffled Harry's unruly black hair. "Remember, Harry, it's not all about studying. Have a little fun too," he said with a wink.

"James!" Lily said, rolling her eyes but smiling. She hugged Harry tightly. "Make good choices, and remember, we're always here if you need us."

Harry grinned, feeling reassured by his father's playful encouragement and his mother's warm support. "I know, Dad. I will, Mum."

Lily added, "And don't forget to write!"

"I won't forget Mum. Promise," Harry replied, returning the hug.

The Hogwarts Express gave out another warning whistle, signaling its imminent departure. James and Lily stepped back, allowing Harry to grab his trunk and Hedwig's cage. Harry took a deep breath and turned towards the train, his heart pounding with a mix of excitement and nerves. He glanced back one last time, catching the reassuring smiles of his parents. With a determined nod, he hefted his trunk and began maneuvering it through the bustling crowd and up the steps of the train. The narrow corridor inside was filled with students, some waving goodbye through the windows, others chatting animatedly about the upcoming year. Harry navigated his way through, his eyes scanning for an empty compartment.

Harry navigated the narrow corridor, peeking into compartments as the train began to chug forward. With each familiar face he didn't see, his anticipation mixed with a twinge of disappointment. His heart sank a little each time he spotted groups of strangers filling the seats.

The train's gentle rocking heightened his urgency. He quickened his pace, his eyes darting around in search of an empty seat. As he approached one with the door slightly ajar, he peeked inside and saw a girl already seated by the window, her trunk neatly stowed away.

With no sign of Ron or Neville and the train now in motion, he couldn't afford to be picky.

"Mind if I join you?" Harry asked, his voice tinged with both hope and reluctance.

"Not at all," she replied, a friendly smile curving her lips. "I was beginning to think I'd have the whole compartment to myself."

Harry took a deep breath and grabbed his trunk, lifting it with considerable effort. He strained as he maneuvered it onto the storage rack, his arms trembling slightly. He glanced over at Daphne, wondering how she had managed without magic. Or did she know some spells already? With one final push, he managed to secure the trunk in place and let out a relieved sigh.

Daphne raised an eyebrow, a grin playing at the corners of her mouth. "Are you sure you're a wizard?"

Harry's face turned a deeper shade of red. They hadn't even had their first class yet, and this girl was already making him feel inadequate. "I'm working on it," he grumbled, avoiding her gaze and fiddling with the handle of his trunk. He sat down opposite her, carefully placing Hedwig's cage beside him. As he settled into his seat, he cast a quick glance around the compartment, a nagging thought crossing his mind that maybe he should have picked a different one. He sighed inwardly, deciding to make the best of it and determined not to let her get to him. Before he could get too comfortable, the girl extended her hand with a confident smile. "Daphne Greengrass."

Harry blinked in surprise before shaking her hand. "Yeah, I'm Harry. Greengrass, right? I think I've heard that name before."

"Quite likely," Daphne replied, a hint of pride in her voice. "The Greengrass family has a long and distinguished history in Slytherin."

Harry nodded, recalling hearing about the Greengrass family before. "Slytherin, huh? So, you're aiming to be sorted there?"

"Indeed," Daphne said confidently. "It is where many of the finest witches and wizards have been sorted."

Harry smiled. "I'm hoping for Gryffindor. Both of my parents were there."

Daphne's eyes sparkled with a mischievous glint. "Gryffindor, huh? That makes sense. You do seem like you have something to prove."

Harry felt a twinge of annoyance at her comment. Who was she to judge him? He opened his mouth to retort, but before he could get a word out, a knock on the compartment door interrupted them. The door slid open to reveal the trolley witch, her cart brimming with an assortment of sweets and snacks. The scent of chocolate and peppermint wafted into the compartment, momentarily distracting Harry from his irritation.

"Anything from the trolley, dears?" she asked cheerfully.

Daphne immediately stood up and approached the trolley. "I'll have a few Chocolate Frogs and some Bertie Bott's Every Flavor Beans," she said.

Not wanting to miss out, Harry quickly joined her. His eyes lit up as he selected a few treats with the galleons he had, including a Pumpkin Pastie, a Licorice Wand, and a small box of Bertie Bott's Every Flavor Beans.

With their arms full of sweets, they returned to their seats. Daphne immediately opened her box of Every Flavor Beans and grinned at Harry. "Fancy a game to pass the time?" she suggested, shaking the box slightly.

Harry eyed the box warily, recalling the unpredictable nature of the beans. "What kind of game?" he asked, his curiosity piqued despite his reservations.

Daphne said, her eyes sparkling with amusement. "We take turns picking a bean for the other to eat. If you can eat it without making a face, you get a point. But if you react, the person who picked the bean gets the point. The first to five points wins."

Harry, not one to back down from a challenge, felt a grin tug at his lips. "Alright," he said. "Let's do it."

Daphne's eyes gleamed with interest. "You're on, Potter."

She picked a bean and handed it to Harry. He took it, eyeing it suspiciously before popping it into his mouth. The taste was immediately awful—rotten egg. Harry focused all his energy on keeping his face neutral. Daphne watched him intently, her grin widening as she waited for a reaction.

After a tense moment, Harry swallowed the bean, managing to keep his expression steady. "Point for me," he said, a hint of triumph in his voice.

Harry then picked a bean for Daphne, a bright red one. She popped it into her mouth and her eyes widened slightly at the taste, but she quickly composed herself, keeping a straight face. "Cinnamon," she announced calmly.

Harry couldn't help but feel a grudging admiration. "Alright, point for you too," he said, trying to sound less impressed than he felt.

Daphne then handed Harry a bean that was an innocent shade of yellow. Harry popped it into his mouth, hoping for a lemon flavor but immediately regretted it as the taste of earwax filled his mouth. He clenched his jaw, forcing himself not to react.

"What's the verdict?" Daphne asked, eyes gleaming with amusement.

"Good," Harry lied, swallowing hard. "Point for me."

Daphne smirked, as Harry picked out the next bean to give to Daphne. She ate it, her face remaining passive. "Spinach," she declared, earning herself another point.

Daphne then picked a green bean speckled with white and handed it to Harry. He hoped for mint, but as soon as he bit into it, the taste of wasabi burned his mouth. His eyes watered, but he fought to keep his expression neutral. "Wasabi," he gasped out, barely managing to earn the point.

Daphne raised an eyebrow but didn't challenge his point. Harry then handed her a brown bean that Harry thought looked unappetizing. She chewed it thoughtfully, her face remaining impassive. "Sausage," she said with a slight nod.

They went another round. Harry's face twisted momentarily as he bit into a dirt-flavored bean, the earthy taste making him want to gag. He quickly composed himself, swallowing hard and managing a weak smile. "Dirt," he said, his voice strained but steady. Daphne, meanwhile, ended up with a Blueberry-flavored bean and smiled smugly as she announced the flavor.

With the score now tied at 4-4, Daphne considered Harry for a second, a sly smile spreading across her face as she leaned in slightly. Harry could feel the tension in the air, his competitive spirit igniting. "How about we raise the stakes?" she suggested, her voice dripping with playful challenge. She drummed her fingers lightly on the table, eyes locked on his. "The loser has to give the winner all the candy we bought from the trolley."

Harry didn't even take the time to hesitate, his competitive nature taking over. "You're on!" he declared, leaning forward with a determined glint in his eye.

Harry handed Daphne a particularly colorful bean. She bit into it, and for a moment, her composure slipped, but she quickly regained it. "Toffee," she declared, earning the point.

Daphne handed Harry a pink bean with yellow specks. As soon as he bit into it, the familiar taste of strawberry filled his mouth. He felt a surge of relief and managed a confident smile. But then, Daphne crossed her eyes, puffed out her cheeks, and stuck out her tongue. Caught off guard, Harry burst out laughing and choked on the bean.

"Strawberry," he gasped, struggling to regain his composure.

Daphne's smirk widened as she watched him struggle. "Not a fan of strawberry, are you?"

Harry finally swallowed, his face red from the effort. "You cheated! That doesn't count, Greengrass."

"A win is a win, Potter," Daphne said, her eyes sparkling with triumph. "Now, hand over the candy!"

Harry sighed, looking at the pile of sweets they had accumulated. Reluctantly, he gathered the candy and handed it over to Daphne. As he did, something dawned on him. "Wait a minute," he muttered, his eyes narrowing. "You only bought the beans?"

Daphne smirked. "Sharp as ever, Potter."

Harry's face turned a deeper shade of red. He felt both annoyed and outsmarted. "You tricked me," he muttered, glaring at her.

Daphne simply shrugged, her lips curving mischievously. "Maybe. But that's just how we Slytherins play."

Harry had to admit, Daphne embodied the cunning spirit of a true Slytherin. As Daphne began to enjoy his candy, savoring each piece with a satisfied smile, Harry leaned back in his seat, arms crossed, and stared out the window. He could hear her delighted murmurs and the crinkling of wrappers, which only fueled his resolve. As the countryside blurred past, Harry's initial annoyance began to fade, replaced by a growing sense of determination. Next time, he vowed silently, he would win.