I'm in Class, and You're Telling Me the Aliens Have Invaded?

[Ding!]

[The Strongest Slaughter System has been bound successfully! Give the invading alien races a taste of the terror of slaughter!]

Watch as a young man with a blood-red giant scythe on his shoulder brings an end to an age of chaos brought on by an alien invasion!

A reborn campus beauty: Wait, he wasn't this strong in his previous life!

His sweet childhood friend: He seems to dislike everyone equally.

His singer girlfriend: He's so cool, right?

The awakened: Shh, whatever you do, don't let him come over! Otherwise, we're in for a world of pain!