hm... first time I see a section dedicated to the "good female character turns bad" genre. I am duly impressed (and actually I am also into this stuff)
lemme contribute. I have a raw copy of Comic Unreal 13, and one of the segments...er, usual manga contributions there has this type of genre. it's kinda big in size (14MB), since it's a raw copy. it's page 177 to 196 of that comic unreal edition.
http://www.mediafire.com/?iggldjoeb9x
hopefully more people can see the darkness at the end of the light, if you get my drift.
PS: rick404, can you provide a dl link of that makai tenshi jibril 3 hcg set? i haven't have my copy of the game yet (himeyashop has a copy yet will take three weeks due to buffer), lemme see for myself if it really is a disappointment, I'll cancel my pre-order at himeyashop.
EDIT: Ilparazzo already gave one. thanks anyway for the tip.