When Yusaku hears of his parents' sudden deaths, he can't be more surprised. But what surprises him most is that his younger sister, Kayla, is coming to live with him. They haven't seen each other in years, so he definitely doesn't expect to see a mature, beautiful fifteen-year-old waiting for him when he goes to pick her up at the airport. And things only get more complicated when Glacier, a new duelist in Link Vrains, asks for Playmaker's help. Will Yusaku be able to balance his new responsibilities with his old ones, or is he finally in over his head?