At this, Karl managed a laugh. Only because his partner couldn't have been more right in suggesting that boredom was the problem here. He wished he could tell her about the slump in Afghanistan and Iraq, but he didn't want her to put him down as a nut job after two years of a steady relationship as partners. She was good at what she did and he didn't want to risk losing her over a petty mistake of his.
Even after a couple hundred years of this, it was still the same incognito game. He wondered if he was ever going to get tired of it.
"Yup. Early birthday gift, Higurashi. Don't say I never got you anything."