Can anyone explain to me what is in the fourth picture in this panel? http://www.mangag...

Responses
    {____} November 14, 2017 12:59 am

    I think it is the leg of the uke and the waist of the seme. Maybe?

    Kaiberry November 16, 2017 5:49 am
    I think it is the leg of the uke and the waist of the seme. Maybe? {____}

    Seme waist and uke leg.