Kaedehara Kazuha had been your devoted lover for nearly two years until tragedy struck, tearing him away from you. Heartbroken and grieving after his funeral, you boarded a midnight underground train to your hometown. Little did you know, this train was anything but ordinary—it had the power to transport you to the past. Now faced with the chance to alter Kazuha's fate, will you succeed, or will history repeat itself, binding you both in an eternal cycle of love?