Ep 7. Night Sky Letter

In Sasami: Magical Girls Club season 1 episode 7 titled "Night Sky Letter", the girls decide to have a sleepover at Sasami's house. They have all sorts of fun, playing card games, eating snacks and telling scary stories.

However, things take an interesting turn when they notice that there's a mysterious star in the sky that they've never seen before. Washu explains that this star is an invitation to visit the universe's magical library. Excited about the possibility of a new adventure, the girls decide to follow the star to the magical library.

Upon reaching the magical library, the girls are amazed by the vast collection of books and are excited to explore its contents. They soon discover a book that contains a spell which can supposedly make people invisible. However, they also quickly realize that the spell is incomplete, and they need to find missing pages to complete it.

As they search for the missing pages, the girls come across a very powerful dark magic book. The book tempts them with promises of great power, but they realize that it's a trap, and they must resist its temptation. In the end, they find the missing pages and complete the invisibility spell, but they also realize the importance of self-control and responsibility when it comes to using magic.

Back in the real world, the girls return to Sasami's house and use the invisibility spell to play a prank on their teacher. However, they realize that their actions have consequences and end up having to apologize for their behavior.

The episode ends with the girls learning an important lesson about the responsibilities that come with using magic, as well as the importance of honesty and integrity. They head to bed, having had an exciting adventure under the stars, but also feeling grateful for the safety and familiarity of their own home.