Just started rereading NanoFate doujins and this is still one of the sweetest works out there despite the anal tag. lol
Btw,
I included Transient Mermaid, it's one of the ones I own without scans. I only started buying doujins last year though so anything that was sold out by then I wouldn't be aware of.
https://www.pixiv.net/member_illust.php?mode=manga&illust_id=52922820
I'm really curious why there's a ring and a panel of Nanoha and Vivio with Yuuno, replacing Fate, and looking like a family. I could guess from the previews but nothing beats reading the full story and feeling the sure fluffness of Kohagura's work.