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"Muscle Training Time" Promotion Boost: Bikini Muscle Training Tickling Challenge! Rion Izumi

A tickling challenge during muscle training while wearing a bikini, titled "Workout Time." This content presents a scenario of tickling pranks during exercise, complementing the stretching episode from Wakashi Lab Vol.4. The unique routine features abdominal workouts intensified with tickling stimulation—supposedly enhancing training effects. As shivery sensations run down the back, the back muscle exercises gain even more momentum—allegedly creating a workout where both body and mind react simultaneously. Additionally, there's the challenge of pulling on a tickling rubber band, enduring intense discomfort so strong it makes one want to clamp their armpits shut. Witness Rion-chan struggling intensely against the double torment of physical training and relentless tickling. Her determined endurance will undoubtedly captivate viewers.