After Shin-san is forced to move away with his current family, he ends up running off back to his real family (Mustyfoot, Neko, and a few others) It's a long way back home, but he manages to make it back in a few days time. By then, Neko-kun is already old enough to be a warrior, now officially apart of Thunder Pack. After Na-san's death, Shin-san took care of Neko-kun for a while before giving him away. Neko-kun at the time was going through some tough feelings, and Shin-san blamed himself for it once he found Neko-kun wandering alone in the forest. The rest speaks for itself. Hope you enjoy this!~