Editing The Unexplored Summon Blood Sign:Volume8 Chapter2 (section)

===Part 8===

Unbelievable pressure pushed down on the two of them.

It had been launched from within the ocean, but the 10m mass of metal easily moved well past the speed of sound on its way to the surface. Water generally had far greater resistance than air, but when using a special condition such as supercavitation, the water resistance could be drastically reduced, making supersonic movement quite possible.

After breaching the surface, the supercavitation cup separated from the tip of the shell. The shell below was designed to handle air resistance, so it maintained its momentum as it blasted through the white clouds.

Yes, unlike a normal rocket, there were no used-up boosters that separated from the bottom one at a time. With a mass driver, the initial velocity was everything and there was no additional acceleration. Instead, it reduced the frictional loss as much as possible by detaching different cups designed to match the ocean, the air at low altitude, and the air at high altitude.

When used as a weapon, the shell would be loaded with a cartridge carrying any number of explosives or an ABC weapon. Or it could fill itself with seawater to increase its weight and drop onto its target from ballistic flight to cheaply produce a mass weapon that rivalled a meteor or asteroid strike.

“Nheeeeeeeeeeeeeeeeeeeeeeeeeee!!”

“Olivia, bear with it. It won’t even take five minutes to arrive.”

However.

A creaking sound rang in his eardrums.

Something was growing from the seam of the thick airlock. It was a swan wing dyed the red of oxygenated blood. Kyousuke held Olivia’s small body and clicked his tongue as the dark color dropped straight down. With solid flashes, more and more deadbolts were sliced through and then the thick door itself was thrown out into the empty air.

The person on the other side came as no surprise.

“War Criminal…!!”

“Come out and playyyyyyyy!! Kyousuke-chaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaan!!!!!!”

How had he caught up?

One of the book girl’s dark-red swan wings had been torn away, but the remaining wing was wrapped around the roaring Boy A. If they had simply been clinging to the shell while it flew at escape velocity, they would have been burned away by the air’s friction. The Repliglass wing must have used subtle movements to fully control the fluid motion so it was diverted away. Even so, the stench of scorched hair reached Kyousuke’s nose.

Meanwhile, Kyousuke and Olivia were doomed because they had lost the thick airlock meant to protect them. At this rate, they would be fried by the friction, especially when they entered thermosphere located higher even than the ionosphere. And even if they did survive that, only the vacuum of space awaited them.

They had no future like this.

What was the key to escaping this situation?

“…”

A dull sound rang out.

It was the sound of Kyousuke dropping an Incense Grenade (sans pin) from his hand. If he set up an Artificial Sacred Ground, the summoner could escape any form of death with the protective circle and the vessel could do the same with the tough body of the Material.

And thanks to the Colorless Little Girl’s interference, they had never finished their battle.

As the tremendous pressure bore down on him, Kyousuke drew the Blood-Sign from his back and spoke quietly.

“Let’s settle this already, you piece of shit.”

A moment later, the intense friction caused everything around them to glow orange.