Omg I love this, it's hilarious. The combination of an isekai and cute child/baby manga is pretty great, especially since that means it doesn't take itself too seriously like a lot of Isekai do and end up as some annoying teenage power fantasy with a MC who can do everything. The best part is they don't even have to try to make the MC seem like some amazing hero everyone adores and all that bullshit, he's a despicable snake and that's how he's meant to be.