Ikki Tousen (Ikkitosen, literally "a lone rider with the strength to withstand a thousand") or "Bakunyu" Hyper-Battle Ikki Tosen is a 13 episode anime series loosely based on the manga by Yuji Shiozaki, which is in turn based on the classic Chinese novel Romance of the Three Kingdoms. The series is known for being full of fan service, featuring a very large cast of attractive young girls, who fight in short skirts and dresses, in addition to numerous other ecchi situations.
