『兩根莖一(yi)起(qi)可以(yi)進去』介紹(shao):故事發生(sheng)在(zai)一(yi)座名為(wei)墮(duo)天(tian)(tian)(tian)城(cheng)的城(cheng)市(shi)(shi)之中,它(ta)夾在(zai)天(tian)(tian)(tian)堂和地獄之間(jian),是(shi)一(yi)座充滿了(le)危險和奇遇的城(cheng)市(shi)(shi)。近日來,城(cheng)市(shi)(shi)里(li)出現(xian)了(le)邪惡(e)(e)(e)的惡(e)(e)(e)靈,他(ta)們(men)依(yi)靠(kao)襲擊市(shi)(shi)民(min)們(men)為(wei)生(sheng),這(zhe)令市(shi)(shi)民(min)們(men)人(ren)(ren)心惶(huang)惶(huang)人(ren)(ren)人(ren)(ren)自危。Panty(小笠(li)原亞里(li)沙配音(yin)(yin))和Stocking(伊瀨茉莉也配音(yin)(yin))本是(shi)兩位天(tian)(tian)(tian)使,卻因為(wei)他(ta)們(men)桀驁(ao)不(bu)馴(xun)的作風(feng)而被(bei)逐出了(le)天(tian)(tian)(tian)堂,來到了(le)墮(duo)天(tian)(tian)(tian)城(cheng)。在(zai)這(zhe)里(li),姐(jie)妹兩人(ren)(ren)遇見了(le)名為(wei)Garterbelt(石井康嗣(si)配音(yin)(yin))的神父(fu),在(zai)這(zhe)位擁有著(zhu)神秘過(guo)去的神父(fu)的帶領下(xia),Panty和Stocking成為(wei)了(le)惡(e)(e)(e)靈狩獵(lie)者,通過(guo)狩獵(lie)惡(e)(e)(e)靈得到天(tian)(tian)(tian)堂金幣(bi),當天(tian)(tian)(tian)堂金幣(bi)積攢到了(le)一(yi)定的數量之時,Panty和Stocking便(bian)可以(yi)借(jie)此重新返回天(tian)(tian)(tian)堂。就(jiu)(jiu)這(zhe)樣(yang),兩人(ren)(ren)在(zai)墮(duo)天(tian)(tian)(tian)城(cheng)的日常就(jiu)(jiu)此拉開了(le)序幕。