Playing Itto as I Transmigrate Across Worlds

PS: This is a book by a beginner author who has only just started writing. I recommend reading it without overthinking things. I’ll do my best to finish it. Thanks.

It has a System, and either one female lead or no female lead? The worlds I plan to visit include Love Apartment, Pokemon, One Piece, the over-the-top anti-Japanese drama Jujutsu Kaisen, Chaldea, Genshin Impact... (I’ll see later if I want to add more.)