Gintoki and Takasugi reveal to each other what they've been doing over the past two years, and decide to go save the one thing they never managed to save in the past: their teacher.
One need only look at history to know.
.على المرء النّظر إلى التّاريخ فقط ليعرف
La historia nos enseña muchas cosas.
Se aprender pela história, vai perceber.