The crucial point of the entire story is the relationship between RYO and KAORI.
RYO is a Don Juan and is always making a pitch for some beautiful girl he meets: but maniacal attitude is only a mask as I told you. His true nature is really different: generous, sincere and brave.
He has suffered a lot in his life, because of his parents' early death and because of his upbringing among arms and wars: even so he has found inside the strenght to react resulting the person, that RYO is now: that it to say a brave good man. His job consist in sweeping away as many as possible Evils!
Also the story of KAORI is painful and beset with difficulties: orphan and adopted by a foster family of the person she believes to be her dear brother. She is able to get over the violent brother's death showing a strong character.
Then the young woman start to work with RYO, which will slowly discovers several Kaori's qualities and skills together with his deep love for her: it will be the same for the girl.
But both of'em know in bottom of their hearths the truth, I mean they love eachother deeply and passionately: the two can't stay far one from the other and they are always ready to sacrifice even their own life to save their own partner.
The secret of City Hunter success is all in this beautiful and tender lovestory, never unreal or impossible, but felt by the viewer like close and realistic.
You can feel the real life in City Hunter by the constant presence inthe various series of the death.
So is this alternating cicle of death and life and love, the Ryo and Kaori's desire to live together side by side and to go on with the smile, although the inevitable difficulties and incomprehensions: all of this makes City Hunter a unique and unforgettable story!
I wanna remind the Umibozu words, referring to RYO and KAORI, that seem finally to have succeeded to express openly and reciprocally their true love feelings:
"Perhaps in our life all of us are searching only a twin soul, with which spend the time, that separates us from the darkness."
Loving his own woman and fighting for the Well are two among the many teachings, that City Hunter give us.