His childhood friend and cousin Mia comes to stay at his house to take his university entrance exams. "I'll be taking care of you for just three days." His cute childhood friend is now a sexual object for Masashi. But to Mia, she's just a childhood friend. Mia forgets her change of underwear and has no choice but to go without it, saying "Oh well." She starts cleaning, saying "This room is so messy, I'll clean it up for you." Wow! She's on all fours, so her anus and pussy are completely visible!! His erection won't subside as he watches the beautiful sights of his pantyless cousin!