Sakura has a strong interest in sex, but she doesn't yet fully understand its deeper world. Driven by twisted desires such as wanting to be teased by someone she likes or going outside without underwear, she struggles to suppress the pure curiosity bubbling within her. One day, while returning from her ukulele class, she notices a warehouse shutter slightly ajar. An eerie, mysterious atmosphere emanates from inside, irresistibly drawing her curiosity.