Nanaka, Tobiji! TIME-TRAVEL AT THE AFTER SCHOOL

is a Japanese light novel series written by Shiki Kuzumi, with illustrations by Kagayo Akeboshi. The series began publication on May 10, 2010 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
The beginning is. According to my junior Nanahana, she suddenly became a time traveler. I'd like to say that you have a cute face and you're serious !? But this is serious. What if you could jump freely into the past and future? Pour hot water into the cup noodles, jump to "three minutes later" and eat without waiting ── What? Wrong? I will give you a notice. There is nothing that will move history, even if it may surprise or disappoint. Because I'm the main character.