If your wondering the other females cept like 1 actually seemingly "really" likes him, or has some interest in him, it seems the other girls like other guys and or just messing with him to "use him" you could say. For example the kendo club or whatever sword girl you find out later is actually following orders to hypnosis and is only doing somewhat as commanded/suggested, she actually likes some other guy.
also, here's to hoping the anime goes further then the manga, which seems to end after the... uhh (forgot name) mystery society that the recent episode talks about, at the rate its going it will end at around 11 episodes maybe? Kinda wish the manga went on further....