Determined to buy a home theater system, Hibiki enters the Silverman Gym arm wrestling tournament for the chance to win 100,000 yen. How will she fare against Zina, her Russian opponent? It turns out she has a lot to teach Hibiki and her friends.
Hibiki and the other regulars at Silverman Gym take a trip to the tropical paradise of Nikunoshima over spring break. Who among them will claim the title of Miss Nikunoshima?
Hibiki embarks on a special training regime in preparation for Sports Day. After the event is over, she hatches a plan to win the grand prize in the Silverman Gym raffle.
Dismayed by her recent weight gain, high school girl and food lover Hibiki Sakura joins Silverman Gym. The hordes of muscle men at the gym are intimidating, but Hibiki gives strength training a try after meeting the handsome trainer Machio Naruzo.
Machio explains why exercising causes you to gain both weight and muscle, and describes how to do a lat pulldown. Akemi lectures on the importance of dynamic stretching. Hibiki learns about Ayaka's family business.
Hibiki, Akemi, and Ayaka hold a welcome party for Zina. Tachibana-sensei deals with the consequences of Zina discovering her secret hobby. The gang enters an idol competition.