2 0 1 2 . ▁As ▁of ▁October ▁ 2 0 1 7 , ▁th ir teen ▁volumes ▁and ▁one ▁short ▁story ▁collection ▁have ▁been ▁published . ▁In ▁the ▁tw elf th ▁volume , ▁Mar uto ▁announced ▁that ▁the ▁series ▁would ▁end ▁in ▁the ▁th ir teenth ▁volume , ▁which ▁was ▁released ▁on ▁October ▁ 2 0 , ▁ 2 0 1 7 . ▁ ▁M anga ▁A ▁m anga ▁adaptation ▁with ▁art ▁by ▁T akes hi ▁Mor iki ▁was ▁serial ized ▁from ▁January ▁ 9 , ▁ 2 0 1 3 ▁to ▁October ▁ 2 0 , ▁ 2 0 1 7 ▁in ▁F uj imi ▁Sh ob o ' s ▁sh ō nen ▁m anga ▁magazine ▁Month ly ▁Dragon ▁Age . ▁It ▁has ▁been ▁collected ▁in ▁eight ▁tank ō bon ▁volumes ▁between ▁August ▁ 2 0 1 3 ▁and ▁November ▁ 2 0 1 6 . ▁It ▁has ▁also ▁been ▁published ▁in ▁English ▁by ▁Y en ▁Press ▁between ▁January ▁ 2 0 1 6 ▁and ▁December ▁ 2 0 1 7 . ▁A ▁spin - off ▁m anga ▁titled ▁Sa en ai ▁Hero ine ▁no ▁S od ate k ata : ▁E go istic - L ily ▁with ▁art ▁by ▁Ni ito ▁was ▁serial ized ▁from ▁February ▁ 4 , ▁ 2 0 1 3 ▁to ▁May ▁ 2 , ▁ 2 0 1 4 ▁in ▁K ad ok awa ▁Sh oten ' s ▁seinen ▁m anga ▁magazine ▁Young ▁A ce . ▁It ▁has ▁been ▁collected ▁in ▁three ▁tank ō bon