Happy Go Lucky

Takashi and four of his class mates, 4th-grade students, cannot flourish in carrying out a back pullover around a horizontal bar. Their gym teacher alerts them: they've 1 week to achieve success when they resign now, then, tomorrow, facing existence difficulties, they'll always try to escape and be bums. In addition, all five must succeed, if one of these canrrrt do it, then these fail. Takashi is actually worried and miracles if he will not be always the looser who could not flourish in the rear pullover bar exercise.