Massacre Happy End

Massacre Happy End is a Manga/Manhwa/Manhua in (English/Raw) language, Mystery series, english chapters have been translated and you can read them here. You are reading Massacre Happy End chapters on www.mcreader.net, fastest updating comic site. The Summary is

High school student Kusakabe Makoto has to work all day to raise money for the treatment of his younger sister, who suffers from a serious illness. The father is unemployed, the mother ran away, leaving the children, bullying at work ... Despite all this, he does not lose hope and continues to live for her sister. But having learned that she did not have long, Makoto falls into despair. Fear of the unknown causes him to take a different look at the value of human life.