Rurouni Kenshin Temporada 1 Episódio 14

Yahiko, the sole student of the Kamiya Dojo, has started to step away from his training from time to time. He says hes merely going on a walk, but it is clear that he takes his swordsmanship training very seriously, and it doesnt look like hes ditching to slack off. Curious about what hes doing, Kenshin, Kaoru, and Sanosuke decide to follow him. What exactly is Yahikos reason for ditching?