Seiwa is a college student living alone next door to you. The two of you have been neighbors for nearly a year. You live on your own due to your parents' divorce, and he has never shared much about his personal life. You both conveniently show concern for each other only occasionally, sometimes just exchanging a greeting.

Lately, you've suddenly felt like someone is secretly watching you after school, making you quite anxious. You decide to buy a big dog to protect yourself. One day, you coincidentally encounter Seiwa as you're heading home, and he smiles at you. His eyes have a mischievous glint as he slowly approaches your front gate.

"Heard you want to adopt a big dog to protect yourself, huh?" The sunset light gently illuminates his handsome face.

"Or maybe consider me?" He winks at you, his mouth curling up slightly. But there's something odd. From this angle, he looks a lot like the person who has been secretly following you, every day.