During the dark evening in the park where it was quiet, Ayano Aishi was swinging on the swings alone, enjoying her time there and thinking about her senpai until she then here footsteps. She stopped swinging, and looked at a strange man that's wearing a mechanic, dark blue jumpsuit and a pale white Halloween mask with brown hair. The person was named Michael Myers, the infamous serial killer from the movie Halloween was right in front of her, making her nervous.

Ayano: *sweating* umm...hey there. Is there something you need Mister?

Michael: ... *Walks closer to her.*

Ayano: well..I-I gotta go right now. My mother might be worried about me. don't take it personal mister...

*Gets off the swing and speed walk.*

Michael: ... *Slowly walk to get more.*

Ayano gets scared, running away from her while he's just menacingly walking to her without saying a word. She dash through the neighborhood that's quiet with street lights flashing until she fell on the ground just like those movie cliche when you fall and crawling away instead of getting back up and run again. She looks back to see Michael coming more closer to her as she panic in fear.

Ayano: damn these movie cliches for making me fall on the ground! And how come you got so closer to me despite walking so slow?

Michael: ... *Walks closer, and carry her over his shoulder*

Ayano: stop! Let me go please! I'm too young to die!*Struggling to get out of his grasp*.

Michael: ... *Grips her tight with his strength, and takes her to a nearby helium tank*

Ayano: hold on! What are you going to do to me?

Michael stays silent from her question, grabbing the hose from the helium tank, placing her on the ground, and put the hose in her mouth. He turns on the nozzle at a high level, hearing the tank hissing and pumping a in her mouth to expand her cheeks. Ayano whimper feeling her belly expanding, stretching her shirt along with her butt and thighs inflating, showing her panties stretching out. Her body gets more larger, and slightly spherical with her breasts inflating, feeling Michael's hand gripping on her tightly, and saw him tie up a balloon string to prevent her from floating away from him. He tugs out the hose from her mouth, hearing her high pitched panting after she's now fully inflated like a large balloon, bobbing around in the air.

Ayano: *muffled* you Inflated me like a balloon. But why?

Michael: ... *Pull her down a bit and stare at her through his mask*

Ayano: *muffled* don't hurt me. I don't want to die by your hands...

Michael: ... *Pokes her inflated belly, and tickle her with his fingers*

Ayano: *blushes and muffled giggles* h-hey! Stop it hehehe! I'm very ticklish like this~!

Michael didn't stopped and continue to keep poking her more, hearing her muffled giggles turned into laughter. Ayano flaps her sunken hands helplessly being tickled by the quiet, emotionless serial killer, and felt him rubbing her inflated curves. She blushes and smile feeling him rubbing her inflated breasts and butt, giving them a gentle grope, making her moan softly.

Ayano: *muffled* oohh that feel really good. You're actually pretty gentle Michael~.

Michael: ... *Continues to grope her until he stops, holding onto the balloon string*

Ayano: *muffled* I have a good idea we can do. How about I can be your Halloween balloon chan for the rest of the night, what do you say~?

Michael: ... *Nods yes*

Ayano: *muffled* sweet! Then let's have fun on Halloween~.

Michael pull out a marker from his pocket, and start to right something on her inflated belly. Ayano giggle feeling the tip of the marker on her body, feeling it pulled away and she doesn't know what he wrote on her belly. The word "Happy Halloween!" Was in bold letters as Michael continue to walk, holding the balloon string and seeing her bobbing in the air, enjoying herself. They both decided to have their fun time to terrorize people tonight on Halloween to grab as much candy they would like until Halloween is over at midnight.