For the longest time Keigo thought he didn’t have a soulmate. He checked every day when he was a kid for the writing of someone else on his skin and there never was any. That was until one day when he getting ready to go to bed for the day. It had been a rough day during patrol and he’d gotten bruised pretty badly. He might have been worried about his soulmate sharing his pain, but at this point he knew he didn’t have one. Sat watching a TV show, he felt the pressure of a pen writing on his arm.