I'm glad his 'goody-goody' streak intrigues you.  While I'm not necessarily trying to make him out to be a literal saint or a messiah, it's my intention to portray Kazuya as someone who isn't ruled primarily by animalistic desires or pure lust.  He doesn't simply want to screw a Pandora and then cast her away like she's some prostitute once he gets bored with her.  As corny as some might perceive him to be in this fanfic, I'm trying to basically have Kazuya portrayed as a bona fide gentleman when it comes to courting women.  There'll be more on that topic when Kazuya and Gengo have their one-on-one sit-down.