Defection

In the year 4215, aliens invaded Earth, and fear and an unknown virus spread like wildfire.

Retired sentinel Zhou Yu joined the new organization of ability users at the start of the apocalypse, but when his identity as a sentinel was exposed, he was cast into the abyss.

Above the abyss, one of the aliens reached out to help him.

Kasuo: “I want to save Earth. Can you help me?”

Zhou Yu didn't believe an invader could have such a change of heart and refused resolutely. But the alien, who didn't even bother hiding its tail, latched onto him. No matter how many times Zhou Yu plunged into suicidal attacks and fell into endless darkness, Kasuo would enter his mental landscape:

Then slap him back to reality.

Kasuo: “Can we talk about working together now?”

Zhou Yu: ? This feels like a damn dream.

The alien who wanted to save Earth first saved the strongest human on the planet.

At first, a steel-straight soldier and one-man army who misjudges people and briefly turns dark (Zhou Yu) x an emotionally detached, poker-faced, naturally airheaded ice mountain with the strongest mental domain in his species (Kasuo)

PS: 1. A nonstandard sentinel-guide setting.

2. A very standard apocalypse setting.

3. The protagonist has a cheat (emphasized three times).

Theme: For love and peace