Armpits are strange: being watched makes them embarrassing, while the slightest touch can be unbearably ticklish. This experiment sets out to transform them into full-fledged erogenous zones, with cool-eyed Abe Mikako and her cute armpits as the subject. The treatment feels almost like tickling and leaves her struggling to catch her breath, yet her soaked panties reveal how turned on she is. Surprised by her own reaction, the naturally receptive Abe discovers increasingly intense armpit pleasure and finishes with a completely new armpit-focused experience. Enjoy watching—or try the teasing yourself.