[GundamAce]

Route B's summary:

Spoiler for Route B Summary:

――For some unknown reason, an explosion occurs underground in LABO, and at that exact moment――
A boy and his friends are present, and say this.

"We didn't make it in time...!"

His name is "Natsuhiko Tenkawa".
The girls beside his are "Mashiro Toba" and "Louise Yui Sannomiya".
They're ordinary students from the local high school, who visited LABO for some reason that way.
In order to accomplish a certain goal, they sneak past the high security of LABO and get inside, but――
Then the "incident" occurs, and they get wrapped up in it.

The explosion causes a fire that rapidly spread, transforming the inside of LABO into the melting pot of Hell.
Natsuhiko's group trembles in fear, then goes off running once they've returned to normal.
But right after that, they meet up with an unexpected person.

"Yuuri Kotono"――although she's Natsuhiko's childhood friend, they live in the same house together.
For some reason, she can't get outside from the house.
They're both bewildered, but Natsuhiko takes her and runs――
Yuuri looks at Natsuhiko, and asks him a question.
"Why did you come here...?"

Those words trigger Natsuhiko's vivid flashbacks.
Six days before the accident, the sequence of events that lead up to this day.
No, it's not just a simple flashback.
It's a strange sensation, like he's gone back in time and is living those six days over again...!

Those flashbacks repeat concurrently alongside Natsuhiko and his friends' escape.
Six days ago, five days ago, four days ago, three days ago...
The flashbacks gradually start to catch up to real time.
Furthermore, everytime there's a flashback, it should be a memory, however, there are definitely "alterations".
Until then, he must pay no heed to the his detailed memories, for his opion of others changes dramatically...

Why is this happening? Even Natsuhiko himself doesn't know.
But in those altered memories, there are countless hints hidden that may lead to the survival of Natsuhiko and his friends.
Natsuhiko must begin to gather these hints in spite of his bewildered mind.
Even though it feels like it's being caused intentionally by someone else's will.

――And at the time all the flashbacks have ended, various answers will be derive from the connected memories.
Why did the incident at LABO happen?。
Why did Natsuhiko and his friends know about it beforehand?
And why is Natsuhiko experiencing this repeating, strange phenomenon...!?

But at the same time, Natsuhiko must face a harsh truth that's been thrust before him that he didn't want to know.
"Your desire for all of you to escape will never be granted."
And once Natsuhiko knows, he must make a choice――!

To break out of this structure where "reality" and "flashbacks" meld together.
In order to survive now, he must repeat the past countless times.