[Prince of Tennis] Mizuki's Diary

Ruixi has a diary that can predict the future.

On the eve of her enrollment at Hyotei, several lines suddenly appeared in her diary:

Rules for Surviving at Hyotei:

First, stay away from the powerful.

Second, keep clear of jealousy.

*

I wanted to flesh out the setting of my other story, so I started this sister story.

If a setting detail makes sense, I'll add it to that story.

Entirely centered on the heroine.

The relationship between [Rui] and [Ruixi] can be understood as [themselves in parallel worlds].

Theme: If you're bored, just start writing!