Given the ambiguity, perhaps the best approach is to focus on "Marianela" and provide a chapter-by-chapter summary of its latest season, while also noting that "El Rincón del Vago" might not be directly related but could be mentioned if there's an episode or plot point referencing it. Alternatively, the user might have confused the titles and actually wants a summary for two different shows.

Wait, the user might be mixing up titles. Let me check. "Marianela" is a novel by Benito Pérez Galdós, right? So maybe they actually want a summary of the last season of the TV adaptation of "Marianela." But "El Rincón del Vago" isn't a TV show I recognize. Hmm. Could there be a misunderstanding? Maybe they meant another title. Let me verify.

Assuming that "Marianela" is the focus here, and the user mistakenly added "El Rincón del Vago." Alternatively, maybe it's a new series that combines elements of both. But since I don't have information on a TV show with both those names, I need to approach this by focusing on "Marianela" as the main subject. However, the user specified including "El Rincón del Vago" in the query.

Wait, maybe "El Rincón del Vago" is a new show in Spain, and the user is referring to it as part of the latest season. Let me check. A quick search: "El Rincón del Vago" appears to be a YouTube channel or online show from Spain with comedic content. It might not be a traditional TV series, so summarizing it by chapters might not apply. Therefore, the user could have made a mistake in the title. Alternatively, maybe they want a summary of the latest season of "Marianela," including mentions of "El Rincón del Vago."