Ikta is a brilliant, but lazy and unmotivated boy.  His childhood friend, a high-ranking daughter of a noble, offers him an easy position at a library if he can help he get the top score on a military exam.  But their lives take a sudden turn when the boat carrying them to the exam runs aground, and Ikta rescues a mysterious girl on board.  When she turns out to be a princess, and they all find themselves behind enemy lines, Ikta is going to start having to work hard for real...
Twenty-one moves ago,
my dear friend Matthew.
منذُ أحد وعشرين نقلة يا صديقي العزيز ماثيو
Vor 21 Zügen, mein werter Matthew.
…hace 21 jugadas, mi estimado Matthew.
…hace 21 jugadas, mi estimado Matthew.
À cause du 21e coup,
mon très cher Matthew.
Ventun mosse fa, mio buon Matthew.
Foi há 21 lances,
 querido amigo Matthew.
Ты ошибся 21 ход назад, друг мой Мэттью.