Ben was riding down a normal neighborhood in the country of Japan, "how did I get wrapped up into this" he asked himself when he saw numerous half animal humans.
"Did you forget already Ben-Kun?" The lady driving the car next to him asked, long story short after Ben was knocked unconscious he was dragged to a hospital. After he woke up the lady who mentioned earlier, Kuroko Smith, said he was thrown out of a vortex in the sky and landed next to her.
He had originally looked like a big humanoid lizard but after a green flash he turned into a human, Ben explained that he was from another universe and that he had the omnitrix.
Along with his alien heritage on his grandmother's side, she then told him that in this world there are creatures called linimals that are mythological creatures turned real. To make peace with them, humans and Linimals developed the interspecies cultural exchange, a way to allow extra species to learn and interact with humans safely and peacefully.
And considering Ben's circumstances Kuroko asked him to be a part of the exchange, after consideration he agreed. It would be good for a more peaceful life anyway, he thought, "me and my big thoughts" he said looking out the window.
"Anyway this man will be your host" Smith said giving him a file folder, "Kimihito Kurusu" he said reading the name of the file, "yes Darling chan is one of our most successful hosts" She said. So how is he the most successful?" Ben asked her, "he took in get this, Seven Extra species girls, he's to nice to all of them, all of which want to sleep with him" she boasted.
Ben, who had been drinking a smoothie they had picked up on the way, spat tank when she said that, "uh TMI much" he said blushing, "well only the first six, the seventh one just hangs around because when he dies his soul will be her's or something" she said.
Once they finally got to the house Ben took notice of some purple smoke coming out of the back window, "uh does that normally happen?" He asked pointing to the smoke.
"No only when Miia, she's one of the home stays you'll be rooming with, makes one of her attempts to cook something" Smith said while Ben sweat dropped.
The coordinator presses the doorbell while Ben took a moment and looked at the house, sure enough this place could harbor a large variety of linimals, "was this always like that or was the house smaller before?" He asked. A moment later the sound of the door opening caught his attention, he looked towards it to see a brown eyed black haired man who had a calming and kind demeanor.
"Oh Smith san I didn't expect you to be here" he said to her, "I'm getting the feeling you've brought me another exchange to host again didn't you?" He asked.
Smith grinned, "always on guard eh Darling Kun?" She said, "anyways yes I have, rest assured this one is not a girl, Ben-Kun come here" she said.
The alien shapeshifter complied and walked over, "greetings, my name is Ben Tennyson, yes I am a linimal by technicality, I am human but by a quarter am an alien" he said.
"In addition I'm also from another world, I would like to thank you for allowing me to stay but if you pass on it I won't hold anything against you", the host in question actually waved his hands, "no it's okay really it'll be nice to have another guy around" he said.
Ben then thanked him for his hospitality and walked in, "also here are his home stay applications" Kuroko said handing them a large stack of papers, "I'll be by later or tomorrow to pick them up...".
Before smith could finish her sentence Ben grew Clockwork's key on his head and used his time powers to freeze time and urged Kimihito to look over the paper work with him, after what seemed like minutes but was really a second after finishing Ben unfroze time and handed her the papers.
"Well that was fast" she commented, "when you have the power of an alien with time powers you can save a lot of it" Ben said before retracting Clockwork's clock key into his head. "And that's only one of the many aliens' powers I have" he said, after walking in Ben took notice of the centaur girl walking toward him, "Master, who art thou?" She asked, "oh Cerea this is our new housemate Ben Tennyson" Kimihito answered.
"Hi there nice to meet you" Ben said holding out his hand, "it's good to meet thou as well, Tennyson san" she said, at that moment the alien shapeshifter spotted a spider woman above him.
"Well well who do we have here?" She asked, "uh Ben Tennyson, I'm a new guest here, what's your name?" He asked, "Rachnera Arachnera, should I have to explain what an Arachne is?" The Arachne said. "Yes if you don't mind, I'm not from this world so I don't know much about linimals" Ben said sheepishly, "what do you mean your not from this world?" A feminine voice asks from behind him, Ben turned around to see a pink haired mermaid.
"Oh the truth is I come from another dimension, we don't have linimals there, so I don't know much about them" Ben answered, "also before anything else happens I'll just inform you that I have a device called the Omnitrix which allows me to transform into a myriad of aliens" he said.
To prove it he turned into his only alien form which was a seven foot tall pale green skinned humanoid reptile with dark green hair wearing a short sleeved emerald green striped black jumpsuit, who had a long tail lizard like face and numerous hourglass shaped symbols around his body. "
"See this form is an Omnisapien, he is actually my current form due to an accident but he has all the powers of my other aliens" Ben said, little surprise everyone was astonished by the sight of Ben's transformation.
Later on Ben formally met the other monster girls staying with Kimihito, Papi a harpy (bird girl) Miia a Lamia (snake girl), Centorea a centaur (horse person), Suu a slime, Mero a mermaid, Rachnera an Arachne (spider girl), and Lala a Dullahan or some sort of headless horse woman.
"Good to meet all of you" Ben said, "you wouldn't happen to have the powers of an alien similar to a spider would you?" Rachnera asked, "actually yes" Ben said using Spider Monkey's tail to shoot a silk strand.
"Whoa aliens are cool" Papi said, Suu mimicked Ben's silk spit, "okay let's all get some sleep now" Kimihito said, Ben decided to sleep in a silk hammock. "Huh like me, you sleep in a hammock also" the Arachne said, the teen hero shrugged it off and went to sleep.
'I think this world may be a fun experience, might as well make the best' Ben thought, unfortunately he was Rachnera's victim of the awkward silk bind.
"Hey what do you think you're doing?" Ben asked the spider girl who was currently tying him up, "oh nothing, ask anyone around the house, they'll tell you that it's a habit of mine to tie people up" she said.
"Now hold still" Ben was then put into a really awkward position, "cut it out already if this keeps up I'll end up ack", he then passed out. The next morning Ben found himself being lowered down by Kimihito, "let me guess the spider got you last night?" Miia asked him, Ben nodded after being released, "don't worry that's just her way of saying she likes you" Mero said.
"Glad to here, now uh sorry to be rude but what's for breakfast, hadn't eaten once since I got to this world" Ben said, however he got splashed when the Lamia accidentally used the spray hose on the sink.
"What a way to start the day" he said wiping the water off his face, unfortunately for him he felt a gooey tendril touch his back, he turned around to see Suu leap on to him.
"Hey what's going on with Suu?" He said as the slime spread herself, "funny thing about her" Kimihito said, "as it turns out, Suu attacks or "interacts" with anyone who is splashed with water" Centorea said.
Miia giggled, "She absorbs the water on them, plus she likes to get to know people that way" she said, Ben decided to fully Transform into Omni and use Ghost freak's powers to go intangible and phase out of Suu's grasp.
"Yeah no thank you" he said, "don't worry she does that to anyone" Kimihito assured him as Suu transformed back into her original shape putting on her rain coat.
"This is going to be one strange new life I'll have in this world" Ben said before floating over to the kitchen to get something to eat.