Dark Evolution Begins with Marrying an SSS-CLASS Blind Monster

Ding! [The Host has died!] A system message popped up in front of Nell's body after his last dying breath. Ding! [Dark Evolution has been activated to absorb the death essence of the host.] And then he opened his eyes to find himself in the past right before the battle started. 'Ah! Am I back to the past?' Ding! [Please choose a partner to start the Dark Evolution process.] [Partner Condition: Must be a living creature from the Monster category, not the Human category] [Partner Gender has to be Female.] 'Partner? A monster?' Nell's heart pounded in his chest, and he felt a cold sweat coming on. 'A female monster?' P.S. Cover isn't mine.