Yuki recently moved in above my apartment, in room 302. She has a cute habit of swaying her plump, bouncy ass as she walks up the stairs, making her absolutely irresistible to me, a total ass lover. One day, I noticed her coming home and was quietly admiring her gorgeous backside on the staircase when suddenly, she lost her balance and tumbled backward—her soft, firm buttocks landing right in my face. Instinctively, I caught her with my face, completely enchanted by the warm, pillowy sensation, but we both ended up falling down together. Worried, she offered to call an ambulance but calmed me down on the spot and eventually brought me to her apartment to recover. Her warmth and kindness only deepened her allure, making her even more attractive to me.