A college student named Warashibe is obsessed with Capsule Monsters and Miho. When she spurns his advances, Warashibe decides to eliminate her friends - his competition for her affection. Warashibe promptly poisons Anzu, Jonouchi and Honda with tainted water, causing the three teenagers to fall ill during class and forcing them to be sent to the Nurse's office for treatment. An enraged Miho confronts Warashibe, but he outsmarts her by challenging her to a game of Capsule Monster Chess, which Miho has no idea how to play. Yami Yugi steps in to help Miho and challenges Warashibe to a Shadow Game where the Capsule Monsters are brought to life. Will he be able to end Warashibe's unhealthy obsession with Miho once and for all?