First thing you need to do. WATCH the closing credits. It's an emotional roller-coaster using several animation styles that is basically a prequel to the series. You can FEEL her suffering the loss of her brother. Yes, the sis/bro thing it way over the top, but the bottom line is she will do anything for him because their previous life revolved around him doing the same for her. Her end-goal is to see him grow and become independent.
The animation is really well done, the sound is great and the voice acting perfect. OK, yea, it's "JAIA" Just Another Isekai Anime - and many characters are cardboard cutouts/boilerplates that are interchangeable with any other JAIA. So if you're looking for originality - you won't find it here.
BUT it's still funny, over-the-top and entertaining.
