[Spoiler warning on the first line] Sometime passed, and now the show introduces the new Joestar. Joseph Joestar is the grandson of Jonathan. It turns out that Erina was with child when Jonathan died. The daughter she bore married the kid she saved from the fallen ship. Both married and had Joseph. 5/5
You need to change the description as it contains a massive spoiler for people who haven't seen the series.
You should also put a spoiler notice at the top of your blog post to warn people (though this is just a personal recommendation).
I could be wrong, but I don't think that the second part of the anime is technically a second season. Again, could be wrong, so that may or may not need changed.
Plus this is just a review of the beginning of the second part. It's very important that you change the title to reflect that.
Or do you mean on the blog?
But the description needs to be changed still. There is a spoiler warning but it still has a major spoiler that might be seen accidentally, if the person hasn't watched it and is just here to respond to the comments.
I think you can just do a summing up of what the review is about, and if not, then perhaps just put in the second last paragraph in which the anime is being recommended.