Are you ready? Because I am

Prologue

8 years
Tendou is a very nice person who helps people. He had a nice family. 2 brothers and a cousin. A mum and a dad. Tendou was one of the nicest people you could get. He was really smart as he could answer every question you throw at him after a second. Some joked that he was a robot.

This all changed after an event. A event as of now he barely remembers all he remembers is a bat man and a room.

This event happened when he was 8. After it he doesn't even remembers his name. He thinks his name is Barry Allen.

This is that event.

Tendou and his family were in a parking lot and he was in the car. He heard screaming and looked out the window and saw  his dad on the ground he got out of the car and hid at the front of it. He saw a group of people with helmets. Shooting his family dead. He is then grabbed by this bat man. The Bat Man says,"You're the one we want for our experiment. You'll be coming with us." He then passed out.

He was tied down. He heard screaming all around him and started screaming himself when he was given a serum. He was tortured a bit before hand then he saw the Bat man and everything went black.

Now he was awake but outside and couldn't remember anything. A man found him and said,"Hello little boy can you tell me your name." "My name is uh-uh I can't remember. Wait My name is, Barry Allen." Barry said.

7 years ago
Barry created the Build driver at 9 years old and then created the fullbottles at 10 (Misora doesn't exist in this one) but can't use them as he needs to be a certain age and well he doesn't remember why he created them or how or what's in them except the Pandora's box.

2 years ago
Barry is enrolling in high school. His plan is to act not as smart as he is. He doesn't want to be noticed (also became sorta emotionless and sometimes anger  but will still be there for his friends)  and just sunk at the back of the class.

Maths was easy but he just didn't act it. It sorta hurt him internally to not answer any questions(that's how smart he is).

Science he didn't need to show anyone anything. So he let his smart's be out and did well in chemistry and biology.

Basically a repeat up until.

3 months ago
Barry turned into Build to help with a problem. He finally gets to try it out.

Barry said,"Time to try this out." He walks over to near the monster and places the belt around his waist then holds up two bottles. Barry says,"Shall we begin this experiment."

The Rabbit Tank Henshin

He is now build RabbitTank form.

He gets his sword and rushes at the monster and slashes at it. Knocking it back a little. He goes in for another hit but the monster blocks it and punches him away. RabbitTank Build then gets back up and kicks the monster and then punches it. "I need to finish this quickly."

Watch from about half way I would say.
(Don't really know know to explain the finisher so doing it in video format the same as the Henshin).

The monster explodes.

Now
Save for Chapter 1