TORN 1: Shinigami's and Demons

Shinigami's and Demons were on war several years past, They were so eager to win so they had a treaty and it said that if one of both sides will cross the borders he/she will be killed.

Rias Takinaga is a shinigami an elite, she knows every thing a shinigami would know... One night she was on a mission and she didn't expect to meet his rival there Reita. He was one of the demons the shinigami's despised so much...... What if one day these two would break the rules that were given to their elders a Forbidden Love between two worlds and they already what their penalty is death/execution..

Will the two of them be able to live with it? or Will they just accept the penalty of death?