DAUR is the romantic pairing of DAC and UKI.
UKI and DAC
UKI (as shone in Forbidden Love) thinks DAC is creepy and doesn't like him. DAC is Saf's a semi-malfunctioning SIR unit. Because he is semi-malfunctioning, he has feelings (mostly towards UKI). UKI tries to stay away from him and DAC tries to get rid of GIR sometimes because he feels that GIR is 'stealing' UKI from him.