Oniichan Wa Oshimai! - Episode 6 -

Kaede’s younger sister. She is tomboyish, protective, and initially suspicious of Mahiro.

The core of this episode is Mahiro's decision—pushed gently by Mihari—to return to school. Since Mahiro is physically a middle schooler now, she can't exactly go back to her old life as an adult NEET. Oniichan wa Oshimai! - Episode 6

While "guide" could also refer to a or a technical guide for streaming, I’ve focused on the most likely intent: a recap and story guide for the episode titled "Mahiro and a New Beginning." Episode 6 Overview: "Mahiro and a New Beginning" Kaede’s younger sister

This episode introduces key supporting characters who become staples of the series: Kaede’s younger sister. She is tomboyish