世界の脅威である異形「蝕」と戦う「螺旋師」候補生の有明。ためらいながらも螺旋師としての一歩を踏み出し始めた有明の前に、過去のトラウマである人物が現れる。さらに、ナナとの絆を試される出来事が起こり……？
5 卷
第 1 卷
2010-09-18
第 2 卷
2011-01-20
第 3 卷 · 本卷
2011-05-20
第 4 卷
2011-09-17
第 5 卷
2012-02-18
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