Silent Gaze
A girl named Nene, contacted the Hell Girl to send her mother to Hell, because she thinks her mother, Honami, kills her father; although the truth is, Honami sends her husband to Hell because he was abusing them (Honami and Nene) eleven years ago. Honami then finds out that Nene is trying to send her to hell, but then kills herself so that Nene doesn't need to go to Hell too. Also where Ren's past is revealed showing that he was once a sword.
Aired 03/02/2007EP 17 - Silent Gaze
Hell Girl: Two Mirrors
Ai Enma once again returns as the Jigoku Shoujo, who uses Jigoku Tsuushin (Hell Hotline) to allow people to post their grudges on their tormentors, sending them straight to Hell. In exchange, the users of the website will end up in Hell after they die. Meanwhile, a mysterious girl with blue eyes called Kikuri appears and seems to have strange intentions towards Ai and Jigoku Tsuushin's operation.
(Source: Anime News Network)