The last time we caught up with Wired Euphoria in September, “Malware” found the Nottinghamshire duo turning a digital nightmare into an unexpectedly convincing breakup song. Beneath its bruised vocals and grunge-heavy distortion, the threat of a computer virus became a metaphor for emotional damage, blurring the line between corrupted data and a heart that had taken one too many hits. With “A Perfect Day,” Jack Cawthorn and Harry Barber continue exploring the uneasy relation