Summary:

In probably the second-best part of one of the greatest Undertale fanfics of all time (Alphys' Bad School Day), Alphys and company reach the final portion of their very first day of junior high school in Hotland; why, Gaster's biology class, of course!

However, just like everything else that ends up happening in this story, the class' subject matter of the day is nowhere near what you would expect from any normal school; in fact, the students' assignment for the day is none other than to strap on a set of nanosuits, shrink themselves down to practically microscopic size and venture inside Toriel's body so that they can explore her beautifully vast and complex system of internal organs, and perhaps even theoretically learn a thing or two about how said organs work in the process!

Of course, however, the students' actual intentions during the assignment are anything but educational; in fact, as it turns out, Gaster's plan the whole time was actually to have Alphys and her friends sneak inside Toriel's brain and take control over her body to make her have the sexual intercourse of her life with her husband Asgore in the janitor's closet!

Do I really need to explain how fucked-up this is?
Categories: Giantess, Teenager (13-19), Adventure, Breasts, BBW, Body Exploration, Middle Age (50+), Butt, Couples, Entrapment, Fantasy, Feet, Furry, Futanari, Humiliation, Insertion, Instant Size Change, Lesbians, Maternal, Mouth Play, Nose, Odor, Unaware, Vore, Watersports
Characters: None
Growth: None
Shrink: Nano (1/2 in. to 2.5 nanometers)
Size Roles: F/f, F/m
Warnings: Following story may contain inappropriate material for certain audiences, This story is for entertainment purposes only.
Series: None
Chapters: 1 Table of Contents
Completed: Yes Word count: 6511 Read Count: 12451

Summary:

Andrea experiences a growth spurt late in adolescence. The rest of the world experiences the end.

Visit my Patreon for early-access chapters and exclusive stories: https://www.patreon.com/JacksmithShrinkStories

Categories: Teenager (13-19), Crush, Destruction, Feet, Footwear, Growing Woman, Instant Size Change, Watersports
Characters: None
Growth: Giga (1 mi. to 100 mi.)
Shrink: None
Size Roles: None
Warnings: Following story may contain inappropriate material for certain audiences
Series: Jacksmith Commission Stories
Chapters: 10 Table of Contents
Completed: Yes Word count: 12088 Read Count: 168710

Summary:

Candace has a problem. Anna has been relentlessly bullying her for years in unorthodox ways. Luckily, she's moving away soon and won't ever have to deal with Anna again. I mean, unless she, say, shrinks down to an inch in size or something, but I'm sure that won't happen. Right?

Quick warning: There's some gross stuff in there somewhere

Disclaimer: All publicly recognizable characters, settings, etc. are the property of their respective owners. The original characters and plot are the property of the author. The author is in no way associated with the owners, creators, or producers of any media franchise. No copyright infringement is intended. All characters in this story are 18 years of age or older.

Categories: Giantess, Teenager (13-19), Breasts, Body Exploration, Butt, Feet, Footwear, Humiliation, Insertion, Instant Size Change, Scat, Slave, Watersports
Characters: None
Growth: None
Shrink: Micro (1 in. to 1/2 in.)
Size Roles: F/f
Warnings: Following story may contain inappropriate material for certain audiences
Series: None
Chapters: 2 Table of Contents
Completed: No Word count: 2104 Read Count: 6678

Summary:

A seemingly ordinary teenage boy is shrunken and kidnapped by the ant colony that lives in his own backyard. He soon discovers that the ants face a deadly threat he never expected-his own sweet little sister! 

He soon discovers an advanced technological insect world no human has ever witnessed before and realises that ants and humans may have more in common than he thought. However, there are darker forces at play and he soon discovers that his backyard ant colony is just one piece of the puzzle of a more significant chain of events. In order to discover the truth, he will have to venture out into the brave new giant world, bug-sized and face threats that he would have never cared about at normal size, including his family and friends.

How are the ants so advanced at a civilisation and cultural level? Where are they originally from? And are there sinister schemes at play?   

Ma15+: Contains frequent strong coarse language, complex, mature and political themes, graphic descriptions of violence, blood and gore, adult sexual references (not involving underage characters), pop culture references, 

I have actually had the ideas and concept for the story for a long time since I was 12 years old, but only now am I actually writing it 😅

Don't be shy to leave a review! 😊 I always respond to all reviews eventually.....

 

Categories: Legwear, Giantess, Teenager (13-19), Animal, Adventure, Young Adult 20-29, Adult 30-39, Crush, Destruction, Entrapment, Feet, Footwear, Gentle, Humiliation, Instant Size Change, Maternal, Mouth Play, New World Order, Odor, Sci-Fi, Unaware, Violent, Insertion, Watersports
Characters: None
Growth: None
Shrink: Micro (1 in. to 1/2 in.), Nano (1/2 in. to 2.5 nanometers)
Size Roles: F/f, F/m
Warnings: Following story may contain inappropriate material for certain audiences
Series: None
Chapters: 7 Table of Contents
Completed: No Word count: 92497 Read Count: 40846

Summary:

Ashely is like any other college student, just trying to get by. Sometimes he just needs to have a little fun.

Categories: Footwear, Animal, Humiliation, Object, Body Part, Entrapment, Feet, Furry, Giant, Insertion, Instant Size Change, Odor, Scat, Unaware, Violent, Vore, Watersports, Butt, Couples, Crush
Characters: None
Growth: None
Shrink: Micro (1 in. to 1/2 in.)
Size Roles: F/m, M/f, M/m
Warnings: None
Series: None
Chapters: 24 Table of Contents
Completed: No Word count: 248167 Read Count: 354297

Summary:

(Ed, Edd n' Eddy) Marie Kanker gets BIG double D is in trouble now.

Categories: Young Adult 20-29, Giantess, Destruction, Futanari, Growing Woman, Odor, Watersports, Teenager (13-19)
Characters: None
Growth: Giga (1 mi. to 100 mi.)
Shrink: None
Size Roles: F/f
Warnings: None
Series: None
Chapters: 1 Table of Contents
Completed: Yes Word count: 2123 Read Count: 2309

Summary:

Sometime after the events of Omori, Aubrey begins to undergo a rapid, uncontrollable growth spurt. And people can't even figure out the cause. 

Spoilers for Omori, obviously. 

Categories: Teenager (13-19), Breasts, Body Exploration, Butt, Entrapment, Gentle, Growing Woman, Humiliation, Odor, Slow Size Change, Watersports
Characters: None
Growth: Amazon (7 ft. to 15 ft.), Brobdnignagian (51 ft. to 100 ft.), Giant (31 ft. to 50 ft.)
Shrink: None
Size Roles: None
Warnings: None
Series: None
Chapters: 7 Table of Contents
Completed: No Word count: 39078 Read Count: 22684

Summary:

A young boy goes against his parents' wishes to receive a normal high school education after years of homeschooling. He was subjected to a virus three years ago that was nearly the death of him and multitudes of others, but he lives on strong at the one inch that the virus left his height at. Has he made a good or bad decision?

Categories: Teenager (13-19), Young Adult 20-29, Body Exploration, Butt, Crush, Entrapment, Feet, Gentle, Incest, Insertion, Mouth Play, Odor, Scat, Unaware, Violent, Vore, Watersports
Characters: None
Growth: None
Shrink: Minikin (3 in. to 1 in.)
Size Roles: F/m
Warnings: Following story may contain inappropriate material for certain audiences
Series: None
Chapters: 11 Table of Contents
Completed: No Word count: 11637 Read Count: 89832

Summary:

When heavy metal loving, pot smoking seventeen year old high school junior Morris Jablonski cuts class to sneak out and blaze up, he unwittingly witnesses the school’s three hottest girls shrink down another student. Trying to sneak away quietly, he coughs, inadvertently drawing their attention…

 

Categories: Teenager (13-19), Adventure, Butt, Entrapment, Growing/Shrinking Out of Clothes, Insertion, Instant Size Change, Mouth Play, Vore, Watersports
Characters: None
Growth: None
Shrink: Minikin (3 in. to 1 in.)
Size Roles: F/m, FF/m
Warnings: Following story may contain inappropriate material for certain audiences
Series: None
Chapters: 18 Table of Contents
Completed: No Word count: 20974 Read Count: 195698

Summary:

Alex has had a rather strange out of place feeling lately until he has a run-in with his socially awkward childhood friend. Hidden pain reveals itself between them as they discover they might not just like each other as friends. 

 

Hope you enjoy!

Read Bio!

Categories: Teenager (13-19), Adventure, Young Adult 20-29, Breasts, Body Exploration, Butt, Entrapment, Feet, Footwear, Gentle, Growing/Shrinking Out of Clothes, Insertion, Muscle, Odor, Scat, Unaware, Violent, Watersports
Characters: None
Growth: None
Shrink: Micro (1 in. to 1/2 in.)
Size Roles: F/m
Warnings: Following story may contain inappropriate material for certain audiences, This story is for entertainment purposes only.
Series: None
Chapters: 8 Table of Contents
Completed: No Word count: 23870 Read Count: 74189