Ataru and the others will join the competition of 'The Obstacle Course Swim Meet', organized by Tomobiki High Principal and Onsen-Mark. Each of Tomobiki High students need to face different kinds of obstacles during the competition, only few of them reach the finalist and their situation is getting harder and harder than previous obstacles.
Toshio Furukawa
as Ataru Morobishi (voice)
Fumi Hirano
as Lum (voice)
Megumi Hayashibara
as (voice)
Akira Kamiya
as (voice)
Mami Koyama
as (voice)
Yuko Mita
as (voice)
Noriko Ohara
as (voice)
Saeko Shimazu
as (voice)
Kazuko Sugiyama
as (voice)
Kappei Yamaguchi
as (voice)