Hmm...The way he just cancels meetings with girls despite picking them up and breaking up quite often definitely doesn't paint him in the best light. Even at the end, he's pretty much just concerned about his own safety.
That ending though. Considering they get along quite well as friends, perhaps this relationship is one that will last a lot longer than previous ones.
BWAHAHAHAHAHAHAHAHAHAHAHAHAHAHA! ... after regaining composure, looks like Keita "grabbed a tigress by the tail", hardly expecting that he'd *cough-cough* "awaken the woman within". And by the end, Asuka's so enveloped in the (a-hem) "afterglow" ("Hey Mikey I Think She Likes It!"), she might not let Keita get away, ever.
Lucky Bastard, or Unlucky Bastard ... or Why Noth Both?