You sat in Chibiusa's belly waiting for a bit more time then unexpected.
"...so it's really not that hard, once you see that it's just a trig substitution mixed with integration by parts, it's just that those are really tedious ways of solving these integrals," Chibiusa shrugs "To be honest, it'd be better to get one of these simple, but long problems instead getting totally stumped."
"Well, it had me stumped..." Usagi frowns.
"Well then, it's a good thing you're studying, dumpling-head!" Chibiusa sticks her tongue out "Alright, any other problems?"
You shrug and squirm around in her belly hoping to surprise her with your movement.
Chibiusa jumps as you startle her. "Huh?" she pats her tummy "Wh... oh..." The girls chuckle quietly to themselves, inviting an indignant glare from Chibiusa. "What's so funny?!" she demands "You better not have spiked my juice with anything funny!"
You stay quiet for a bit and then chuckle as well. "No no one messed with your juice."
"Oh, well that's good to..." Chibiusa looks around curiously "Hey! Who said that?!"
"In your belly." You said hoping she heard you or not.
"Yeah, okay, that’s enough messing around," Chibiusa stands up and looks around "Who are you? Are you in the closet or something?" She starts walking around.
"Chibi…" Ami covers her mouth as she laughs "He’s not lying. He’s really in your stomach."
"What?! When did you get in there?!" Chibi pats her tummy and stares at it for a bit "You better not be plotting anything! I’ll drink a hot chocolate if you are!"
"Whoa feisty little one." You said with a chuckle. "I was in your snack bag."
"And just what were you doing in there?" Chibi pats her tummy again, sternly.
"Relax, Chibi," Rei nods "We put him there. It was just a little prank."
"Well that's very funny," Chibi looks up at Rei, not amused "So he's just in there, now? Is he even going to be okay? Am I going to get sick?"
"What a worry-wart," Ami laughs "Hard to believe your Usagi's kid! You'll be fine. He's indigestible, and clean. He doesn't mind, either. Isn't that right, Tim?"
"Yep, I don't mind at all, even if it took a good while to get used to the idea." You said.
"Uh... you sure?" Chibi asks "What kind of person doesn't mind being eaten?"
"That kind!" Ami pokes Chibi's tummy, much to the latter's chagrin.
"And Time? Is he related to anything like the Silver Crystal?" Chibi continues.
"Far as we know, no," Usagi shakes her head "He just appeared in my house, that small. Luna found him first, and since then, we've..."
"We've found out he quite likes to be eaten," Rei adds "And apparently, he's from a dimension where we, and our adventures and stuff, are all an anime to him."
"An anime?!" Chibi asks "Where's the camera?" She starts looking around the room.
"Silly, you don't film an anime," Ami chuckles.
"She's right,." You said. "Think of it like a cartoon you would watch ChibiUsa, and you were pulled into that certain cartoon and you told them the same they'll be confused like how everyone here was until it gets to a understanding."
"Well, if you put it that way, then..." Chibiusa scratches her head "Well, it doesn't matter. You're here now, and I don't know about sending you back to your homeworld. Besides..." She pats her tummy.
"I think I rather like having you in there," she smiles softly.
"Well, this has been quite a day," Usagi stands up and yawns "I think I've had enough studying for one day."
"Much as I'd make fun of you," Ami checks her watch "It is getting late. We oughta head home for now."
"Alright then," Rei shuts her notebook "Thanks for coming, guys!"
"See you tomorrow~" Usagi packs her stuff up and heads for the door, with Chibi and Ami following suit.
You smiled a bit as you heard what Chibiusa said as you got comfy and snuggled against her stomach wall.
"Mm, this is gonna take some getting used to," Chibi patted her tummy as they walked down the sidewalk.
"Hm? Yeah, he's just getting comfortable," Usagi shrugged. In time, they arrived at their house.
"So, how long were you planning on staying in there?" Chibiusa asks as she gets settled into her bedroom.
"Hmm, well Ami did say that I'll have to stick around in here for a bit when it comes to fights, but I think at the next group up you can let me out so I can go to Makoto or Minako." You said.
"The next group-up?" Chibi raises an eyebrow "So... you know that means you'll be in there until tomorrow afternoon, maybe evening... right?"
"Well, not like he's got anywhere else to be..." Luna jumps up on Chibi's bed and gets comfortable.
"Yeah I know, I'm sure your stomach wouldn't mind some company for the whole day." You said.
"I mean..." Chibiusa shrugs "Well, alright then. As long as you behave yourself, okay?" She smiles and proceeds to change into her pajamas. "Ah..." she slides under her covers and gets comfortable "Well, good night, Tim."
"Good night Chibiusa." You said.
You spend a restful night inside of Chibiusa's stomach. In the morning, you awaken to the sound of her showering. After finishing, you hear her brush her teeth for a few minutes and exit the bathroom. Your surroundings tremble as she pats her tummy from the outside.
"You awake in there, Time?" you hear her ask.
"Yeah I'm awake Chibiusa, did you sleep well last night?" You asked nuzzling the wall of her belly. "I slept peacefully in here I can tell you that much."
"I slept well, thanks," she nods "Still a bit weird to carry you around like this, but... well, it's also nice, in a way. I don't have time for breakfast, so I'll just have a protein bar and some juice. Look out below, alright?" She enters the kitchen to pour herself a glass of juice and opens the pantry to find a bar.
You moved to another part of chibiusa's belly to be out of the way so I wouldn't get hit with the protein bar and juice
Her breakfast comes down momentarily, while you stay safely off to one side. Her tummy quakes as she pats it outside.
"I'm heading to school now. Do you need anything before I go?" she asks "I can't talk to you while I'm out of the house, and... well, try not to move around too much, okay?"
You take some of the food and eat. "Hmm no I don't need anything else ChibiUsa"
"Alrighty then," she gives her belly one more pat before heading for the door "I'm off!" With that, she departs for school. She walks at a leisurely pace—evidently not excited for classes—, which makes your ride quite smooth and comfortable.