The story revolves around Nayu Hayama, who embarrasses herself on the first day of middle school by accidentally showing her adult panties. As two other students, Yako Jingūji and Haruka Shiraishi, hear rumors of her engaging in "enjo kōsai", or compensated dating (which often is viewed as being close to or the same as prostitution), they investigate. They soon learn that Nayu is an 'underwear monitor' who tests new underwear products, and has great insight on what underwear people should wear. Nayu hopes to help everyone get through the vital stage of their life by opening an underwear club.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | The Girl with Adult Panties | 2010-01-04 | 30 min |
| Season 1 | Episode 2 | This Swelling Chest | 2010-01-11 | 30 min |
| Season 1 | Episode 3 | A Windy Day | 2010-01-18 | 30 min |
| Season 1 | Episode 4 | Each Has Their Own Shape | 2010-01-25 | 30 min |
| Season 1 | Episode 5 | Between an Adult and a Kid | 2010-02-01 | 30 min |
| Season 1 | Episode 6 | Radical Puberty | 2010-02-08 | 30 min |
| Season 1 | Episode 7 | Swaying Hearts of Men | 2010-02-15 | 30 min |
| Season 1 | Episode 8 | An Underwear Overnighter! | 2010-02-22 | 30 min |
| Season 1 | Episode 9 | My Seventh Grade Summer Vacation! | 2010-03-01 | 30 min |
| Season 1 | Episode 10 | Throw Out That Chest! | 2010-03-08 | 30 min |
| Season 1 | Episode 11 | My Afternoon with Her | 2010-03-15 | 30 min |
| Season 1 | Episode 12 | Before Meeting You... | 2010-03-22 | 30 min |
