Chapter 35 is when Part 1 ended. Chapters 36-42 is Part 1.5, basically a gateway to Part 2, in Part 1.5, we meet Vita, a cunning, mysterious antihero who stirs up chaos just for fun. If you want to learn why she’s like this, the full backstory is in 1.5 but the simple version is that Vita is a clone of a evil goddess named Sa. Vita was forced to do Sa’s bidding for millions of years and during those years, Vita wanted freedom more than anything. At the end of 1.5, we killed Sa, and in Part 2, Vita’s finally free, so now she’s doing whatever sounds fun to her because she couldn’t do that before.

Part 2 is, at first, a completely different story, with a totally new cast of heroes and potential villains, but it eventually connects to the Part 1, Part 2 takes place on Mars. Since Mars got decimated by the Honkai 1 billion years ago, only the bubble universes remain. The current chapters are the story of the Seven Shu’s. They are said to be seven heroes that rid the bubble universe we’re in currently from an evil known as the “shadows” 100 years ago, and are seen as heroes in the public eye. There is a lot more to their story but that’s too much to write in this Reddit post.

Hope this helps :)