It is now the beginning of a new school week. Mason enters with Mabel, not having a single idea of what awaits him today.

"Well I'll see you later, Bro-bro!" She waves with a smile.
"See you at recess, Sis!" He says with a smile and reaches the hallway and finds the class waiting to enter the classroom

He finds his friend standing away from the others, facing the opposing direction. And so he goes to join him and greet him with enthusiasm. "Hey, Sammy!"

But as soon as those words leave his mouth... Samuel's head slowly turns around and he slowly says, with a lot of sadism and delight in his face... "Suuuuuuuuup, Pinetree!"

Dipper gets a good look at the creepy yellow eyes and couldn't believe what he sees. He gets scared, shaky, frozen in place... He wishes he was having a nightmare, but it is real... Bill Cipher is in front of him, and he took over the body of his best friend.

"Y-y-you... H-H-HOW?" Many, many questions race on his mind as Sammy's body approaches him in a taunting manner.

"You are so funny when you're freaking out!", he says as he smiles. "Hey, I did something for you last night, and I think you'll just loooooooooove it..." He seems very sadistic as he says that.

Dipper can't speak except going "U-uh...?"

Bill then reveals with a devilish smile "Remember these?". He shows a sock puppet representing Samuel on his hand and the boy reacts in horror, having terrible flashbacks of the day he got tricked into becoming Bill's puppet. It causes him to tear up in fear.

Bill is loving what he sees and approaches his hand to Dipper's face, taking a very stupid sounding voice to represent Samuel. "No no no, I don't want my friend to be sad!" He gets closer with the puppet, pretending to wipe the tears, much to the boy's discomfort. "I'm gonna do everything so he'd be happy! Even if it means..."

Dipper talks, very scared and also angry. "If it means... what?"

Bill then makes the sock puppet disintegrate with a snap of his fingers, driving the point home that the boy's best friend is gone. Dipper stays there, devastated and speechless, while Bill enters the classroom.

After a few moments, Dipper gets called out for being late to enter. As he enters the room, he recalls something horrible... He's sitting right next to Samuel, so he looks to find him tapping the seat with a creepy smile on his face as he awaits. Dipper sits very uncomfortably next to him as his fake friend acts cheery. "Come on... We'll have a veeeeery fun day together!" He gives his neighbor a shoulder bump, one that doesn't help ease the discomfort.

At some point during a math exercise, Bill asks quietly with a smirk. "Hey now, Pinetree, why being so nervous?"

Dipper gets angry. So much that he almost forgets to stay quiet. "You're kidding me, right? I should be fine when I'm sitting next to a demon posing as my best friend?"

Bill giggles. "Still a drama king! Glad to see you haven't changed! You have nothing to fear..."

Dipper speaks loud enough to be heard by the whole class. "Of course I do, I'm next to a demon!"

After a few seconds of silence, as stares of judgement start to form, Samuel speaks up with a lie. "Sorry about that, he was telling me that he had an awful nightmare and he couldn't keep the emotions to himself. Please forgive him..."

The boy is very frustrated to have been caught up like that, and to see that everyone buys Bill's explanation as the puppet master manages to be completely undetected.

The teacher speaks up: "Alright class, I need someone at the board. Um... Samuel!"

"Right away, Sir!" Samuel stands up fairly cheery as he grabs the board's marker. He gets asked the exercise's complex geometry question to solve, which he sees with a smile on his face. "Ooh, a triangle! That's the best shape!" With how big Bill's knowledge is, he's able to do the calculations and provide the correct answer in a matter of seconds, as if he was asked how many corners the shape has. He gets some applause while Dipper is furious at how blind everyone seems to be, right before recess rings.

Everyone leaves the classroom for now, with Dipper looking very frustrated. But Samuel stops for a second with a grin on his face...

Dipper joins recess, and he was so worried in his thoughts that he didn't think about going to see his sister. He feels uneasy about Samuel in so many ways. And then he finds out he's actually late for recess, as he comes outside a few minutes later.

Samuel arrives to be greeted by an angry and suspicious Mason. "What were you doing?"

Sammy doesn't have a single worry to show. "Nothing to worry about, you should just chill. Everything's fine..."

Even more frustration builds on the kid's body. "You're lying! I can tell! What are you plotting?"

Nothing changes about Sammy's behavior. "You're truly paranoid! It's kinda cute to see." He giggles.

"ANSWER ME!", he yells, only to not get a proper answer. He decides to catch his breath for a bit and think things through. He feels fear, anger, and anxiety, also hopeless because he thinks no one can help him, and he doesn't want to get his sister worried about that for now.

As he goes in the hallways after recess, he catches some interesting talks from his classmates. It seems something is up inside the classroom, and as he enters to see the board... He lets out a huge yell in front of everyone. Just before joining recess, Bill vandalized the exercise from earlier to draw his demon form, adding his eye, limbs and accessories. He yells "It's the mark of a beast! A demon! Who did this?"

Between this and the disruption from earlier, talks from his classmates are heard. "What's wrong with this guy?", "Why is Mason scared of a dumb prank someone did?", "Has he lost his mind?", "He's definitely looking for attention...", "He's being such a lunatic..." and so on... And he feels even more frustrated and sad as he struggles to catch his breath.

Samuel enters the room with an evil grin. He's enjoying the pure terror in the kid's face. But once again, he lies to the class and the teacher, playing them like a fiddle.
"Please don't be too harsh on him. He's kind of... not himself today!"

The choice of words make him even more furious. They sound incredibly sadistic given the circumstances, and he lets it out. "SHUT UP! YOU'RE NOT SAMUEL!". It definitely doesn't help his case.

The teacher has every reason to think he's the one guilty for chaos. "Mason Pines! You calm down, and apologize to your friend right now!"

Dipper is about to yell back at the teacher, but Samuel shuts him up quickly enough. "It's okay, Sir, he's had a rough night, that's all..."

"I better not hear anything more out of you, Mason! And I don't know who did this on the board and thought this was funny, but it isn't!" The drawing gets erased, somehow calming Dipper down just a bit. But he is not happy. He has tears of frustration waiting to come out.

As the two sit together again, Samuel acts serious. "You should be thanking me... I'm avoiding you a one way ticket to an asylum..."

Dipper remains furious. "Thank you...? Thank you? Why did you even do that anyway?"

Samuel acts nonchalent. "I just thought you missed seeing my true form, my actual prettiness instead of that bag of flesh and bones I'm using. And you're really way too easy to get to this state." He gives a taunting smile. Dipper is about to explode from the situation and all the arrogance his fake friend is showing.

Yet the taunting is only beginning... "You should admit, this was a good drawing, no? For using human arms, it was quite pretty."

Dipper says silently. "Shut... up..."

"Aww, what's your problem? I don't please you? You want me to do more with you?"

Still silently: "Shut... UP...!"

"How about, outside school, I go and cause some more chaos to make your life even more interesting? Doesn't that sound like... like an interesting deal, my friend?"

These last words are all that was needed for Dipper to finally snap, and pin Samuel against the ground violently. To the shock of the entire class. And at this point... The teacher couldn't deal with this behavior anymore and separated the two boys.

"MASON PINES! Disrupting class is one thing, same with yelling at your classmate. But physical assault? You've done it! You're expelled for the rest of the week!"

Dipper gasps and feels his heart broken... This is the first time he got in such trouble. As he exits the classroom with his stuff without a word, he gives one last furious glare at Samuel and leaves the school early to wander on the streets for now.

The rest of the school day went on without another issue after Dipper left. At the different break times, Mabel is worried to not see her brother anywhere. And when she asks Samuel about it... He lies saying he doesn't know, while he knows he's forced to eat very little outside.

Then comes the end of the day and Samuel leaves for home. Barely a few steps away from the staircase, he gets greeted by a furious Dipper.

"I bet you had fun... Planning my demise... Watching everyone get fooled by you... Ruining my image... I take it, you are proud of yourself..."

Samuel looks at him with amusement. "It wasn't even something I planned. I even tried to avoid it. But I must admit... you were entertaining to watch, Pinetree!" He lets out a laugh just as he leaves, leaving Dipper with angry and conflicted emotions.

Mabel sees him from the distance and she runs to join him, very worried. "Bro-bro, I didn't see you all day! I was so scared! What happened?"

Her brother is, however, in a mood with zero chills, as he answers with a rage she never saw before. "It's... none... of your... business...!"

"Uh?" She looks genuinely shocked at seeing this kind of answer, and it only gets worse from there. "What do you mea...?"

"It's not your business! LEAVE ME ALONE!" These words are heavy to listen for his sister, and she just walks home alone, not saying anything other than crying to herself.

Dipper arrives home, hiding everything about the situation to his family. And likewise, Mabel didn't say a thing about what her brother said to her, only leaving him alone as he requested.

Once at Samuel's home, Bill starts thinking. "It was so funny seeing Pinetree getting so mad. I didn't even try to make it happen, maybe I'm just that good!" He laughs evilly. "But now what am I gonna do without him tomorrow...?" He takes time to think. "I'll definitely figure out something wicked to do..." He says as he gets an evil grin and his eyes start shining in the evening's darkness.

Author notes: So, a very eventful chapter here, uh? Bill stopped the patient game revealing himself, and chaos naturally ensues. Poor Dipper...

Once again, Mabel had to be left off for most of this chapter. In fact, Bill revealing himself to Dipper and not to her yet is why I had to put her in a different class. But I'll make sure she gets her chance to shine later on.

Thanks for reading!