Montgomery glands are small protrusions near the nipple. They are sebaceous glands that secrete sexual pheromones and are dotted around the areola. Although each one is small, stimulating the protrusions causes the sensitivity to swirl around the entire areola, leading to a full erection of the nipple. This feels better than continuing to stimulate the nipple directly, and Mei Washio's nipples reach their highest point ever! Watch as this S1 actress shakes her big breasts and burns with new pleasure.