Sangekitou no Mowgli

Sakae, a young man who works hard to treat his sick brother, is abducted by a suspicious man just before surgery. The place where she was taken was a closed lonely tower ... and many traps were set in it, sinking to the bottom of despair. But a more terrifying opponent than a trap attacks. The battle begins without understanding the purpose and identity of their so-called "Mogly". The only thing I understand is that their bodies are so similar to "ares" ... I have to return to my brother's recovery. Which is the best choice in the extreme?