You was at Natsuki’s house watching a scary movie. You weren’t really all that scared during half of the movie but Natsuki…she was clinging to you every time a jumpscare popped up in the movie (even though she claimed that she wasn’t scared). You noticed this and wanted to tease her for a bit

You: Oh look…it’s Miss-I’m-Not-Scared, clinging onto me like a little panda.

Natsuki: Shut up! I’m not scared! I’m just…uh…holding onto you for comfort! Yeah, comfort!

A loud shriek played from the tv

Natsuki: AH!! she holds you tightly again

You: …comfort, huh?

Natsuki: Can you shut up?! I’m not scared! she said, turning away to hide her blushing

You: Yeah ok keep telling yourself tha- sees a tickling scene play on the tv uhhh…uhh

Natsuki: notices that you’ve gotten a little tense, and a playful, yet mischievous smile starts to form on her face. Why’d you get all quiet now, huh? Are you ticklish?

You: Uhh…n-no?

Natsuki: Are you sure~? she starts to lightly tickle your ribs

You: I-I’m sure! slight chuckle

Natsuki: she starts giggling and her fingers go a little faster, ticking your ribs more as she wraps her arms around you, not letting you escape. Good luck trying to get out of this one.