My cute childhood friend, who also has big breasts, seems to have someone she's interested in recently, and I have slightly complicated feelings... One day, my childhood friend, who came to consult me because she had a problem she could only tell me, said, "I heard that big breasts have low sensitivity and I'm worried... Hey, could you touch them a little?" and said something unbelievable! Is this a chance? No, my childhood friend is seriously confiding in me! There's no choice but to take off one piece of clothing! When I boldly squeezed her big breasts, she gave a subtle reaction. "I guess it's true after all..." said my dejected childhood friend. But right after that! The moment my finger accidentally touched her nipple, she twitched! "Th-there... it feels really good..." So, with daily "nipple scratching," I developed her nipples! My childhood friend, whose sensitivity increases day by day and repeats nipple ejaculation, and my libido, which increases day by day with my childhood friend's ejaculation! What will happen to us!?