AKB48 sub-unit Not yet will be releasing their 5th single, "Hiri Hiri no Hana", on September 25.

That will make about a year and four months since Not yet released their last single, "Suika BABY". Their upcoming single is described as a pop support song with a strong message. For its coupling track, it will include "Tsugi no Pierce", which is being used in an online foreign exchange CM starring Oshima Yuko. 

The single will be released in 4 different versions: Type A, Type B, Type C, and Type D. The 3rd track for each type will be a song with each member as the center position. 

The jacket covers and track list can be seen below. 

CD:
01. Hiri Hiri no Hana
02. Tsugi no Pierce
03. Moshimo, Te wo Tsunaideitara (Oshima Yuko center song)
04. Hiri Hiri no Hana (off vocal ver)
05. Tsugi no Pierce (off vocal ver)
06. Moshimo, Te wo Tsunaideitara (off vocal ver)

DVD:
"Hiri Hiri no Hana" Music Clip
Others

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<Type B>

CD:
01. Hiri Hiri no Hana
02. Tsugi no Pierce
03. Bakuhatsu Professor (Sashihara Rino center song)
04. Hiri Hiri no Hana (off vocal ver)
05. Tsugi no Pierce (off vocal ver)
06. Bakuhatsu Professor (off vocal ver)

DVD:
"Hiri Hiri no Hana" Music Clip
Others

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<Type C>

CD:
01. Hiri Hiri no Hana
02. Tsugi no Pierce
03. Sasayaka na Boku no Teikou (Kitahara Rie center song)
04. Hiri Hiri no Hana (off vocal ver)
05. Tsugi no Pierce (off vocal ver)
06. Sasayaka na Boku no Teikou (off vocal ver)

DVD:
"Hiri Hiri no Hana" Music Clip
Others

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<Type D>

CD:
01. Hiri Hiri no Hana
02. Tsugi no Pierce
03. Mienai Sora wa Itsudemo Aoi (Yokoyama Yui center song)
04. Hiri Hiri no Hana (off vocal ver)
05. Tsugi no Pierce (off vocal ver)
06. Mienai Sora wa Itsudemo Aoi (off vocal ver)