The problem with his plan is that the girls could probably end up hating him... wouldn't that affect the Goddess' power?
As long as Ayumi, Tenri and Kanon still like him in the end... let the others hate him, lol.
I still have a hard time believing Chihiro may have a Goddess within... and the other two have been shown so little after their arcs that I also have my doubts.
BTW... Ayumi looked so cute blushing like that