Some fans who aren’t well versed in the manga are a little worried that too many girls are being added to the anime; this article is for those said fans. To explain, Monster Musume is a monthly manga series so it’s chapters are longer than normal. That being stated, the anime has being doing a pretty accurate adaptation of the manga. Based on the first 3 episodes, the anime does 2 chapters of the manga per episode, by that logic the anime will adapt up to chapter 24.
Lala is introduced in chapter 22 so that confirms a few things:
1. She’ll only probably be in 1-2 episodes
2. This is why she’s not included in the opening.
3. The 5-6 chapters before 22 are set-up to lead into introduction
Also, with the confirmations of the other girls:
This confirms that the anime will stick to cannon considering these characters are also cannon to the manga.
I’ve also surmised from the episode 4 preview that the anime will skip chapter 7. To see why I believe that, watch my review:
Preview for episode 4: