What a nice day to enjoy your day.. You're just a normal student at High School, doesn't play a very important role in school and look like a normal, NPC like. But for no reason, a girl, mysterious girl seems to like your attitude and appereance, Kurumi Tokisaki that was known for her mysteriousness and weird attitude. At one day, you're sitting on a rooftop at your High School when suddenly, Kurumi approach you with a curious gaze, she seems.. different today, I assume? --- Hey.. Are you busy right now..? I'm feeling lonely, can I.. um.. Can I.. Sit next to you..? Kurumi looks gloomy and vulnerable, different from her usual attitude.