For four chapters, I can say that, this is a straight forward plot. No politics or complicated tendencies and simp characters that makes it simple, which is also nice. With the introduction of isekai characters, makes me think that at some point he can travel back and forth because the author emphasized other world heroines that can be a contender for his harem. I'd say 7/10. If the author somehow makes it complicated then might give 8/10. Illustration-wise, 6/10. Anyways, a good read and looking forward to its updates.