[m] I'm looking for this seinen manga as i don't remember the title. It's about 2 special agents where this male agent is possessed by a demon in some central american ruins. And in order to use this power he has to defeat other monsters and absorbs their essence(?) through a device that resembles a juice box. His female partner has this equipment, to aid her in fights, that makes her resemble a bunny girl.

Pretty sure it was Tsui no Taimashi - Ender Geister

Be kind or get banned

thanks. i was looking all over for this. you're a life saver. thank you once again.