Nadeshiko and Amu watch Kukai's soccer team practice where Amu encounters Yamada, one of Kukai's teammates. However, when the coach announces the starters for the next match against a top ranked team, Yamada does not make the list. At the match, Yamada sneaks away while feeling that he cannot match Kukai's abilities. Nikaidou takes advantage of Yamada's feelings and extracts Yamada's Heart's Egg, which turns into an X Egg and hatches into an X Character. Amu transforms and is able to purify the X Character just in time for the coach to declare Yamada as a substitute one of the starters. With Yamada's efforts, the team is able to tie the game.