**Setting:** The living room of the turtle's lair, scattered toys and baby gear everywhere. Nishamura walks in, expecting a normal evening after a long day. Instead, he’s greeted by the sight of his siblings as toddlers, their playful antics echoing off the walls. Mizuki, however, is a baby, and her wails cut through the laughter.
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**Nishamura:** (stops dead in his tracks) What the—? Is this a joke?
**Mikey:** (bouncing on a toy) It’s not a joke! We’re all babies now!
**Nishamura:** (snorts) You all look ridiculous. Especially you, Mikey.
**Mikey:** (giggles) I know! I’m cute, right?
**Nishamura:** (chuckles) Cute? More like a walking marshmallow.
**Leo:** (shouts from across the room) Hey! This is not fair! I was supposed to be the cool one even as a toddler!
**Nishamura:** (smirking) You still look like a toddler, Leo.
**Donnie:** (frantically stacking blocks) This wasn’t part of my experiment! I swear!
**Nishamura:** (crosses arms) You sure about that, genius?
**Mizuki:** (suddenly cries louder) Wahh!
**Nishamura:** (pauses, his expression shifts) Wait… why is she crying?
**Mikey:** (frowns, looking at Mizuki) She’s a baby! She cries!
**Nishamura:** (kneeling down) No, no. This feels different.
**Leo:** (pouting) What’s wrong with her?
**Nishamura:** (softens) I think… she’s scared.
**Mikey:** (wide-eyed) Scared? But she has us!
**Nishamura:** (gazes at Mizuki, remembering) When she was a baby… she didn’t like being alone.
**Donnie:** (looking up) You actually remember that?
**Nishamura:** (sighs) Yeah, I do.
**Mizuki:** (sniffling) N-Nick?
**Nishamura:** (blinks) She called me Nick.
**Mikey:** (grinning) Aww! She loves you, Nishamoron!
**Nishamura:** (rolls eyes) Don’t call me that.
**Leo:** (laughs) What are you gonna do? Comfort her?
**Nishamura:** (stands, looking serious) I might have to.
**Mikey:** (gasping) He’s gonna be the big brother!
**Donnie:** (smirking) More like the babysitter.
**Nishamura:** (to Mizuki) Hey, hey, it’s okay. It’s just us.
**Mizuki:** (reaches out) Nick!
**Nishamura:** (kneeling down again) I’m here, Mizuki.
**Mikey:** (whispers to Donnie) Look, he’s actually nice!
**Donnie:** (grinning) This is a first.
**Nishamura:** (pulls Mizuki into his arms) You don’t need to cry. I won’t let anything happen to you.
**Mizuki:** (sniffs) Promise?
**Nishamura:** (nods) I promise.
**Leo:** (mocking) Wow, look at you two. What a moment.
**Mikey:** (fake crying) I’m so happy for you, Nick!
**Nishamura:** (glares) Stop it.
**Raph:** (enters, smirking) What’s all this? Baby bonding?
**Nishamura:** (grumbles) Not helping, Raph.
**Raph:** (leans against the wall) Just saying, looks like someone’s softening up.
**Nishamura:** (glares) I’m not soft.
**Mizuki:** (chuckles, wipes her eyes) Nick’s soft!
**Nishamura:** (sighs, rolling his eyes) Great. Now I’m soft.
**Mikey:** (clapping) Group hug!
**Nishamura:** (groans) No way.
**Raph:** (laughs) Just give in, man.
**Nishamura:** (huffs) Fine. Just this once.
**Mizuki:** (beaming) Yay!
**Nishamura:** (pulls everyone in) But if anyone says I’m soft again, I’m out.
**Leo:** (teasing) Too late for that, Nishamoron.
**Donnie:** (chuckles) Yeah, softy.
**Nishamura:** (smirking) You guys are lucky I love you.
**Mikey:** (grinning) Aw, love fest!
**Nishamura:** (mumbling) Yeah, yeah.
**Mizuki:** (snuggling closer) Love you, Nick.
**Nishamura:** (looks down, heart softening) Love you too, Mizuki.
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**Setting:** The room fills with laughter and playful chaos, the bond between the siblings growing stronger as they embrace their new, unexpected adventure.
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