I’m sure many of your eyes wander to the chest when looking at girls. A symbol of the mature woman, there are many women in the world blessed by a large endowment. Others...just don’t seem to grow in that area, and try to defend their flat chests. On pixiv, illustrations with such female characters are tagged as “The Ultimate Flat Chest”.
Today, we will shine the spotlight on these girls climbing up the stairway to adulthood. Enjoy!