The fifth volume of the Oh My Goddess! manga covers chapters 31-36. For its initial release by Dark Horse Comics, this volume was subtitled "Sympathy for the Devil".
This volume is notable for introducing Skuld, the third goddess and the younger sister of Belldandy and Urd, as well as containing the first half the six-chapter "Lord of Terror" story arc.
Volume Description
Ever since a cosmic phone call brought the literal young goddess Belldandy into college student Keiichi's residence, his personal life has been turned upside-down, sideways, and sometimes even into strange dimensions!
When Belldandy learns that traditional Japanese custom dictates a woman make homemade chocolate for her love on Valentine's Day, she vows to make this a V-Day to remember. When troublemakers extraordinaire, Urd and Mara toss themselves into the mix, it's instant hot chocolate; but not as hot as the situation Keiichi is in when the Third Goddess splashes into his life-Urd and Belldandy's "genius" of a younger sister, Skuld! Plus notes and commentary, a message from creator Kosuke Fujishima, and your letters!
Chapter List
Valentine Capriccio
Urd convinces Belldandy to make Valentine's chocolate for Keiichi and plans to interfere to get them together, but Mara has a similar idea with chocolate of her own.
The Third Goddess
Belldandy and Urd's younger sister Skuld arrives on Earth along with reality-bending "bugs" that wreak havoc around the temple.
The Goddesses' Greatest Danger
Skuld builds a bug-catching machine, but it will only work if the goddesses can eliminate a black hole that originated from within Keiichi.
Urd Goes Wild
While Mara takes possession of a demonic artifact, Urd's goddess license gets suspended after repeatedly lying and she must live like a normal human.
Terrible Master Urd
Having embraced her demonic heritage and becoming the Lord of Terror, Urd launches an attack on the temple.
The Ultimate Destruction Program
Removing the bonds that restrict her power, Belldandy attempts to rescue both Keiichi and Urd.