Shiho was first introduced in volume 4, where she got put in the Rabbit group in the Cruise Ship Special Test along with Kiyotaka Ayanokōji, Honami Ichinose, Kei Karuizawa, her classmate Mio Ibuki and others.[1]

During the test, Shiho and her friends, Nanami Yabu and Saki Yamashita who were in the same group, had an altercation with Karuizawa, after the latter was accused of shoving their friend Rika and was demanded an apology. Karuizawa feigned ignorance and used Machida from Class A as a shi