Dimension Overload

Ever since ancient time Dansak a disastrous being or monsters from another dimension which is known as Meorite, has been trying to invade the human dimension known as Georite. Each time they have been defeated by a certain organisation known as GDFC a.k.a. Georite Defences Force & Committee in Point Dimension, a space between two dimension where time can be frozen for certain periods.
Tonikawa Ryusaki, seventeen years old second years high school student, is the Commander of Japan Branch GDFC . Despite being very young, he has what is required to be an exponent fighting machine. Maintaining his privet school life , he fights against Dansak whenever a break point is determined. With high enhancement gears and weapons he along with four members, his squad is unstoppable in entire Japan. Yagadashi Katana which he inherited from his late father, former leader of Japan Branch GDFC, is quite a helpful partner for him as it has a high affinity to destroy any kind of Dansak.
They fight day and night to protect the world which is unaware of the situation of getting targeted by Dansak. As the GDFC always stops advancement of Dansak before they reach the break out point know as Dimension Overload.

The Dansaks are divided into many types based on how much damge they can cause to the earth. [EDR= Estimated Damge Rate]
These Types are D2[EDR-0.001-0.01%]
Following by D1, C3, C2, C1, B4, B3, B2, B1, A5, A4, A3, A2, A1, S10, S9, S8, S7, S6, S5, S4, S3, S2, S1,
And finally S+[EDR-100% or more]

The have specific names for eache category.
D-> Defectives [EDR 0.001-0.1%]
C-> Collaptors [EDR 0.1-03%]
B-> Brusters [EDR 03-20%]
A-> Annihilators [EDR 20-70%]
S-> Supernovas [EDR 70-?? %]
These numerous value will be explained better in due time.


[There are more complex mechanism and events that are detailed in the novel. Do read if you felt like reading a super action fighting novel.]