The Objects Show Tickle

Yin Ghost or Invisible?

One day on School lab, Test was practicing some Potion. And Yin comes on Lab.
Yin: "Hai TT, what are you doing?"
TT: "I created some Potion"
Yin: "What Potion?"
TT: "This is Invisible Potion, you will Invisible but can take or touch any things"
Yin: "Oh... You done?"
TT: "I'm not Test this yet, but! You can be my Test!"
Yin: *Glup* "What?!"

Test Tube drink Him the Potion and His Body start Invisible.
Yin: "Well.... This is works..."
But the Weird is, Test Tube Can't hear Yin.
TT: "Yin? I know you Invisible, Can you Speak to me Where are you?"
Yin: "I'm here!!"
Yin keep Yelling, but Test Tube didn't Hear Him still.
Then Yin take Some TT Project to show where is he.
TT: "Oh Yin! There you are!"
Yin speak, but TT keep can't Hear Yin.
TT: "Oh no, is Like It can't make someone Hear you when you Invisible"
Yin: "I guess...?"
TT: "Well, I don't know When the Effect gone, But just wait to a minutes, and Just stay here"
Yin: "Okay?"

Yin look him self at Mirror, but his shadow isn't there.
Yin: "Hm, I look Like a ghost~"
and Yin think will be Tried this invisible thing.
Yin: "But I think this is Will be like Fun?" *Grins*

Yin Fly over and Left the Lab, Test Tube Back.
TT: "Uh... Yin?! You still here?"

Then Yin Flying around School, and He do something Naughty. He Eat the last Food from someone, and they start Scared.
Yin: "Opss, I didn't mean Scare them"

Yin look Burrito and Gun bullying Someone. And Yin Push Burrito and Take Gun in to the Locker.
Yin: "Hmhm"
Then He look at Trophy with some Girls.
And Yin Tease Trophy and Make all Girls Laugh at Him.
Yin is have Fun with Invisible.

Meanwhile, Yang And Tune is talking
Yang: "Tune? Did you see my Brother?"
Tune: "Yin~? No~ I not see him"
Yang: "Did you hear that most people is Tell that was a ghost?"
Tune: "Yeah~ I don't know they Lying or not~"
Yang: "Yeah, Is sounds stupid"
Tune: "Yeah~ ghost isn't real"

Yin then found Yang and Tune, He was Touch his own face and he can feel it, then He have an Idea.
Yin Sneaky fly behind Yang.
Yang: "Anyways I was...."

Yang suddenly Feel Something Scratch his Sides.
Tune: ?
Yang: "Ugh! No...Haha!"
Yin: "Hehehe"