Oh My Goddess! Vol 9
Dark HorseCovers this volume completelyPhysicalJun 11, 2008$10.95
ISBN-139781593079703ISBN-101593079702
Digital · EPUBJul 13, 2016$6.99
ISBN-139781630088194ISBN-101630088196

From the Dark Horse edition
Keiichi turns into a woman after trying to cure Belldandy's illness with Urd's mysterious medicine.
Source: OpenLibrary
2 editions · 3 releases
PhysicalJun 11, 2008$10.95
ISBN-139781593079703ISBN-101593079702
Digital · EPUBJul 13, 2016$6.99
ISBN-139781630088194ISBN-101630088196
PhysicalpaperbackApr 12, 2016$19.99
ISBN-139781616558956ISBN-101616558954