Kimi no Tonari de Nemuritai

Synopsis

Kazuik caught a cold from a guy, while on her way to her University Entrance exam. The day of the exam she got a fever, and so she cursed the guy that she had met. All she knows is that he took the same exam, and that his ID number was #400. Later she is at her apartment cleaning. As she dusts her sheets on the balcony, she notices a guy. But he looks familiar. Who could he be...