A youthful love story with Satomi, the older sister I met in the housing complex, finally reaches its climax! The protagonist, a latchkey kid, was playing alone one evening in the complex when Satomi, who was active in her school club, approached him. Back then, she was even more energetic and already a popular girl drawing attention at district-level competitions. From that day on, they started hanging out at each other's homes until their parents returned. Satomi smelled wonderful, was incredibly cute, and made the protagonist's heart race—though he always hid his feelings. One day, after growing bored of drawing and playing cards, they watched a TV drama together and stumbled upon a love scene. The protagonist froze, completely captivated. When Satomi tried to change the channel, he blurted out, "I want to see how it ends!" She teased, "Such a cute face, but already so naughty," and in that moment, the atmosphere shifted, pushing their relationship into uncharted territory. Later, they coincidentally met again at the housing complex plaza. As it grew dark, Satomi invited him over, saying, "It's dangerous out here—come to my place." From that day on, they spent more and more time together, bathing together, sleeping side by side in the same futon, their bond deepening rapidly. Every morning, the protagonist would pretend to go to school, then return once his parents were gone, spending late nights alone with Satomi. Eventually, Satomi quit her club activities, her grades dropped, and her life began to change drastically. The two became addicted to intimacy, and even after advancing to the next school level, they kept borrowing erotic books and adult videos, mimicking what they saw. Though Satomi didn't fully understand at first, she gradually started saying increasingly suggestive things and doing embarrassing acts. Her parents eventually noticed the change and, worried, transferred her to a strict boarding school. Yesterday, the protagonist spotted Satomi back in the housing complex and learned she had graduated and returned home. Now, all he wishes for is to see her again.