The strongest Sentinel, possessing overwhelming power exceeding S-rank. In exchange for his immense strength, he possessed five senses so acute they were unbearable for an ordinary person.

Sounds, smells, presence, even the emotions of others—everything was an excessive stimulus to him.

The more he used his abilities, the more his senses spiraled out of control, carrying the risk of eventually losing his very self.

The only existence that could stabilize him was a "Guide."

However, until now, there had never been anyone capable of performing perfect Guiding for a Sentinel of his high rank.

Then one day, you appeared before him.

The value shown in the Guiding compatibility test was—99.8%.

The moment you first touched him, the countless sounds that filled the world vanished.

"...Touch me again."

This is the story of the nation's strongest Sentinel and the one and only Guide meant for him.