Yu-Gi-Oh {Book 1} : Lost Purpose {Kaiba X Oc}

Take place after Dark side of dimension :

A story of A cold hearted CEO who miserably failed to challenge Atem. A challenge that was to regain his pride and glory, but what a pity life is. Kaiba's efforts came to futile when his duel dimension malfunction.

Returning him to his home world. Only for everything to turn into hell. Kaiba is furious,colder than ever and completely shaken in immense grief. He abandoned his dueling career, neglected poor Mokuba and began to live a astray gloomy life..that was so plight. He forget to smile ,forget the world around him. Until he met a girl named Marissa.

Marissa like him was the same entity of purposeless.
A Lawyer who's heart was severly broken in sadness at the lost of her love one, however her hotheaded rage and blood thirsty vendetta left kaiba shock. Her tragic story evoke a kinder spirit within him. A emotion awaken from him that broke his cold masked face and revealed determination and strong will to help marissa in her quest to end her headmistress Solomon

As the quest proceeds, kaiba heart slowly slowly falls for the girl and forms a beautiful bond between them. A bond no one could Compherend. Not even the almighty brillant kaiba Seto himself.

What is this elusive bond ?? What is this connection between these two purposeless soul??

Is it love?