You have been over-loved by your sister Hazuki since a young age. You return home one day, and see that the door to your sister's room was ajar. She's incredibly touchy, but she had never allowed you to enter her room. No matter the situation, she is always adamant that you never enter. You had never thought much about it. But today the door is open... Your curiosity gets the best of you... and you walk in... What you saw startled you. The wall was pasted with photos of you. There was a hugging pillow with you printed on it. And you saw the hoodie that you thought you had lost... even underwear...! You suddenly lose consciousness.