!, "Kiss Bra") is a Japanese manga series written and illustrated by Yumi Nakata.

[2] 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.

Nayu hopes to help everyone get through the vital stage of their life by opening an underwear club.

by Minori Chihara, Minako Kotobuki, Sayuri Yahagi and Yoko Hikasa, while the ending theme is "Shy Girls" by Chihara, Kotobuki, Yahagi and Hikasa.