Yawaraka Sangokushi Tsukisase!! Ryofuko-chan is a Japanese manga and anime, loosely based on Luo Guanzhong's 14th century novel Romance of the Three Kingdoms. It began in the comedy manga I, Otaku: Struggle in Akihabara by Jiro Suzuki, which the characters watched in their world. It was turned by Square Enix into a real manga in Monthly GFantasy magazine. It was later turned into an anime by Starchild. Source: Wikipedia (en)