Waka has an older brother named Shun, who excels in both literature and the military arts. Despite being a teenager, he remains composed and capable of leading effectively.
Jishaku to Denki no Hatsumei Hakken Monogatari, a 1983 book written by Japanese educator Kiyonobu Itakura, serves as the basis for Time Travel Shoujo. This work is part of the larger Hatsumei Hakken M...