How Heavy Are the Dumbbells You Lift?

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.

Satomi Tachibana, one of Hibikis teachers, comes to Silverman Gym to lose some weight. Can she hide her secret hobby from her students? Ayaka joins Hibiki and Akemi for lunch, and notices that something about Hibikis bento feels off…

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.

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.

The daily routine at Silverman Gym is interrupted by the arrival of a man from Machios past.

Hibiki and her friends visit an unusual shrine for New Years, encounter difficulties when planning their first workout of the year, and enter an amateur talent show.