For underwear fetishists who adore the natural scents found on big sister's panties—sweat, odor, discharge, urine, and pussy cheese—this is nothing short of a treasure. Freshly laundered, brand-new underwear holds no appeal. Instead, we present a special challenge: making Miho Minoha wear the same pair of panties continuously for three days. Through extreme close-ups, we capture the evolving stains from day one to day three, carefully documenting their transformation. A mysterious and captivating project that lets you peek at the whitened pussy cheese, then witness her get even wetter—an experience of the "stain spiral" at its most intense.