This fic is one of the proofs that Touhou can mesh well into other settings and still appeal to people better acquainted to one of the two fandoms. A Lighter And Softer adaptation of Final Fantasy VII (although stylistically closer to Advent Children), it features our lovable Baka Cirno as Cloud, Meiling as Tifa, and Reisen as Vincent, but other characters play their AC-inspired universe roles too (most notably Marisa as Yuffie, Yukari as Shinra's President, Ran & Chen as a duet of Turks (Reno & Rude ostensibly, but the characterization is a bit mixed), Letty as Zack, and... Reimu as Aerith), with a few characters donning original, more minor roles (Mystia sings at Meiling's bar, while Keine teaches the local school and Mokou being Letty and Cirno's rival). This fic is also loaded to the brim with Shout Outs (in-joke or otherwise), to the point that the translators feel the need to do additional 1-2 pages just to explain them. It is also quite popular, to the point that characters from Advent Cirno are one of two sets of fan-made characters featured in Touhou Puppet Play/Touhoumon.
Gunbazca's review
This fic is one of the proofs that Touhou can mesh well into other settings and still appeal to people better acquainted to one of the two fandoms. A Lighter And Softer adaptation of Final Fantasy VII (although stylistically closer to Advent Children), it features our lovable Baka Cirno as Cloud, Meiling as Tifa, and Reisen as Vincent, but other characters play their AC-inspired universe roles too (most notably Marisa as Yuffie, Yukari as Shinra's President, Ran & Chen as a duet of Turks (Reno & Rude ostensibly, but the characterization is a bit mixed), Letty as Zack, and... Reimu as Aerith), with a few characters donning original, more minor roles (Mystia sings at Meiling's bar, while Keine teaches the local school and Mokou being Letty and Cirno's rival). This fic is also loaded to the brim with Shout Outs (in-joke or otherwise), to the point that the translators feel the need to do additional 1-2 pages just to explain them. It is also quite popular, to the point that characters from Advent Cirno are one of two sets of fan-made characters featured in Touhou Puppet Play/Touhoumon.