Yua constantly fantasizes about a sexual relationship with her junior office lady, Aine. When Aine returns from a sales call, her blouse is damp with sweat under the arms. Sensitive to the scent, Yua becomes overwhelmingly aroused, consumed by the desire to lick Aine's armpits. Unable to suppress her feelings, she finds herself compelled to confess her urges to Aine. Their intimate connection deepens beyond control.