Chika, with her slightly plump belly, joins a fitness club to lose weight, only to discover the training involves unexpectedly erotic routines! Under the guise of mat exercises, she's made to do push-ups, sit-ups, and back extensions—but each repetition comes with a forced blowjob. The scam grows even more intense with tickling fitness sessions in a tiny bikini. Her writhing, squirming movements during full-body workouts bring out Chika's allure in the most captivating way.