Supreme Mission System

Mu Xiaobai was an otaku who was born on Earth and was a teenager. He was electrocuted and passed away one day while he was doing what he did best, which was playing games in a cafe. 
Who would have guessed that the next time he opened his eyes, it would not be to the sight of a big God in heaven or the flames and the devil in hell, but rather a fresh new day in Venice? .
Even more surprising was the fact that he was a small child!! That was fine, but the next thing he knew, he was being carried off by two sisters and made to bear their love, which was as heavy as a mountain. Even hell wouldn't have been that suffocating!
Was it really a punishment for having an excessive appreciation for attractive women? 
This is what Mu Xiaobai believed until he bit into an apple that the women had brought for him to eat, at which point he abruptly became aware of the presence of a soft voice close to his ear.
"If you eat a piece of that adorable apple, your strength will go up by 5."
[Current stamina: 80.]
Who or what was talking to him in his head? Did it play a role in his transmigration?
If that is the case, then why did it send him over here?