村上康治はイジメられていた。
無視されたり、悪口を言われる程度ならと耐えていたが、それも徐々にエスカレートし始める。
しかし周りに頼れる相手はおらず、段々とその精神は追い詰められ、疲弊していく。
全てに絶望して楽に命を絶てる方法を探す中で、悪魔召喚を紹介するウェブサイトに出会う。
記事を読み進めるうちに、『自殺するぐらいなら復讐しろ』、との言葉を見付けて試してみることに。
半信半疑ながらも召喚に必要な材料を集め、自らの魂を代償として悪魔を呼び出そうとした。
しかし現れたのは謎の生物。
それに驚いて家を飛び出した康治は事故に遭い、魂よりも先に命を失いかけるのだが、その呼び出した謎の生物──魔物と融合することで命を繋ぐことに。
こうして魔物との融合を果たした康治は、その特殊な力までも手に入れて、自分をイジメてきた相手に復讐を始めるのだった。
Koji Murakami was being bullied.
He had tolerated being ignored and called names, but it gradually started to escalate.
However, there is no one around him that he can rely on, and his spirit is gradually pushed into a corner and becomes exhausted.
As he despairs of everything and searches for an easy way to end his life, he comes across a website that introduces demon summoning.
As he continued reading the article, he found a phrase that said, ``I would rather take revenge than commit suicide,'' and decided to give it a try.
Although he was skeptical, he gathered the materials necessary for summoning and tried to summon the demon at the cost of his own soul.
However, what appeared was a mysterious creature.
Shocked by this, Kouji runs out of the house, gets into an accident, and almost loses his life before his soul, but he decides to stay alive by fusing with the mysterious creature that summoned him - the monster.
In this way, Kouji was able to fuse with the monster, and even obtained its special power, and began to take revenge on the person who had bullied him.
