Last Round Arthurs, Vol. 3 (light novel)

You don't know what you have until it's gone. Luna is on the verge of deathwhen a new King viciously attacks her using their Jack, Sir Tristan. Meanwhile,Rintarou joins forces with someone who used to be in the Dame du Lac, ready togo up against another version of himself. Neither Luna nor Rintarou are ready togive up their respective fights--especially if it means they have a chance toget back what's precious to them.