Produced by ZETTON, CETD-246 is the most unique work in Sunohara Mirai's list of works—the theme is armpit hair obsession. The female protagonist is set as a "plain-looking former pianist" who hides a completely opposite true self behind her serious classical music training, with a strong obsession with armpit hair.

The contrast in this setting is the biggest selling point of the entire work. Sunohara Mirai departs from her usual pure or mature image, presenting here a proactive, assertive, and strangely conquering female figure.
The way she pressed her armpit hair against the other person's face conveyed a strange sense of dominance, which, combined with her own upright face that didn't fit the "grotesque" image, created a strong cognitive conflict.
The incestuous relationship in this work provides an emotional background beyond the armpit hair theme, preventing the story from becoming merely a display of morbid curiosity. Sunohara Mirai's performance, even within this specific framework, maintains her consistent level of engagement, with meticulous attention to detail.

CETD-246 isn't a mainstream work, but for viewers who want to see a completely different side of Sunohara Mirai, its rarity is its value. The combination of a former pianist, armpit hair, and adultery is probably unique in the entire history of Japanese AV.