The spiral that sucked Kohei in is now letting loose it's reign on him. It's crazy how the trauma of being raised by without a family and by bandits in the mountains can shape a path of turmoil for anybody. Kohei seemed like he was a good kid and he unfortunately walked the path of death. Musashi also walked down that path and still has to in order to reach the title of "invincible under the sun", but let's see what Musashi learns along the way.
Sasaki Kojiro being mentioned in that final panel is eerily exciting.