Chihiro is a macabre-loving high school student who collects horror films and thinks shacking up with a zombie chick would be hot. But though the idea of death is alluring, when faced with the actual death of his beloved pet cat, the teen buckles under the grief, and becomes determined to bring his deceased companion back to life. Every night, he sneaks off to an abandoned building and attempts to brew a resurrection potion, and it's here that he meets Rea, the beautiful daughter of the well-to-do Sanka family. However, the girl is having some troubles of her own, and after a mix-up ends up zombified herself! Now the horror fanatic is living the dream with his very own zombie girlfriend, but how will the pair deal with Rea's new diet and the onset of rigor mortis?
Both stories are about a boy who winds up having a zombie girlfriend move in with him after she dies & comes back.
Both manga are about guys who encounter beautiful girls who've become an undead being. Both are very similar as they attempt to keep these girls in their homes while trying to live their lives as normally as possible.
Both of these series are about a boy who has a close relationship with a dead girl ....who isn't all that dead. Both undead girls have a dark past. In Tasogare the girl's past is a huge mystery which dominates much of the manga. In Sankarea, the girl's past is made evident early on, but the big mystery is her future.