The Witch Wants to Confess to Gin

Fei Na Yutian is a gray witch, Koizumi Akako's big-sister figure, and not part of the Conan science-based world. She has a childhood friend named Kurosawa Jin, because the witch is obsessed with long silver hair. Her dream is to change her surname to Kurosawa (crossed out). Pah. To safeguard world peace. Both parents dead, no car, no house, and there's a ... at home, plus a godmother with princess syndrome and a younger sister with chuunibyou. They can transform into other people at random. (Swish! A huge banner unfurls, ) The Organization's newly recruited executive, White Fennel Liqueur, is waiting for Gin to mix her a Silver Bullet. Notice: 1. The heroine is a local. Her position is to keep the world from being destroyed by little Conan. Otherwise, her worldview follows Gin's, so she's on the black side. 2. The heroine has cheat abilities but is a fragile mage. There's lots of additional worldbuilding about the magical side. 3. A sweet, happy-ending story. 4. Personal takes on the distillery organization, with original genuine liquors and a head honcho based on the author's own setting. 5. The timeline has been worked out and is even set before Year Zero, so there's basically no pairing. 6. Shu and Akemi are not a couple; Akemi is purely on the black side, according to the author's setting. 7. The Hagiwara family is on the black side. Theme: Keep away from the Grim Reaper and may the world be at peace