Nyaadventure: The Fluffiest of all story! [DROPPED T-T]

(Don't mind the cover)Anthony, lost his parents at the young age of 14… Since then he took upon himself to take the role of parents for his four little sisters, and also to take care of his weak grandmother which was gentle enough to become their guardian even as she was quite sick. But sadly, four years later, as Anthony was walking back from work he received a call announcing to him his grandmother death… And as he was worrying about what he should do from now on to be able to raise his little sisters properly, the night of his grandmother funeral, as he fell asleep a big surprise was waiting for him!Two young child around 4 years old, who both had quite the weird appearance, appeared in his dream. Telling him they are his parent reincarnated as both the demon king and queen, telling him that they wanted to see their children again… They summoned them to the world they were reincarnated to! But they failed the summoning and because of that they will ‘all' appear at the opposite side of the world, not only that apparently their body will undergo some strange.While having quite the bad feeling about this strange dream which was quite realistic, Anthony woke up… In a forest! And surrounded by four adorable strange small human-cat girls! But wait! He's one too?! And if that wasn't enough, it seem like they all gained rpg like powers?!