I Was Possessed by a Game in Hunter X Hunter

Oh no! I've been possessed by a game.

Oh no! I've also become Taihei Doma, and I have a hamster-like little sister!

Oh no! This world is actually a fusion of multiple worlds!

Oh no! My storage space is insanely powerful!!

Oh, then I guess it's fine!

P.S. The worlds included are Himouto! Umaru-chan, Hunter x Hunter...