Whaaat?! Terumasa's Study Companions?

On Hōjō Terumori's orders, Terumasa's study companions are to be chosen from Hagi Meirinkan. Named are the well-born Yukisa Takuma, the academically brilliant Gō, and Chokkaku. Chokkaku moves into the Hōjō mansion, where for some reason Yukisa treats him with open severity. Chokkaku pays it no mind and struggles to become a good friend to Terumasa — while Terumasa, for his part, tries to make trouble for him, acting spoiled and setting nighttime pranks…