Syo, Ren and Cecil are made into a Cross Unit and are selected to be featured in a commercial for a mobile phone brand. Things head off to a rocky start with each member's conflicting ideas about what the theme for the commercial should be. They end up getting into a heated argument but realize that their fellow member's ideas were just as good as theirs. In the end, with help from Haruka and their friends, they are able to come up with the perfect theme for the commercial and Haruka's new song.
Après le cross-unit d’Otoya et Natsuki, c’est au tour de celui regroupant Ren, Shô et Cecil d’obtenir un contrat. Ils doivent créer la publicité d’un nouveau téléphone, mais ils n’arrivent pas à se mettre d’accord.
