Aspiring Femme Fatale
A girl named Ran tries to send a man who betrayed her to hell, but meets a geisha woman who said she'll help her get revenge. Ran disguised herself and seduced the man. The woman steals all the man's money and he finally commited suicide. Ran eventually finds out that the woman has been using her and is attacked. She managed to send the woman to Hell before she finally dies (after being attacked by that woman).
Aired 27/01/2007EP 16 - Aspiring Femme Fatale

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)