Yojouhan Shinwa Taikei - 1x04 - 弟子求ム- Followmy.tv

In this episode, the protagonist signs up as a disciple of Higuchi, but discovers that he is 15 minutes too late to be the first discple, the position having been usurped by Ozu. Higuchi makes him and Ozu do several meaningless tasks, and the main character is not sure what training he is receiving. Akashi is also a part of the disciple group. The protagonist receives a task to find a mystical tortoise brush that can clean almost anything, and he's helped by Akashi-san in this quest.