Front cover of Gantz 1 . Bought it from Kinokuniya.

Back cover of Gantz 01.

Story: A pair of high school students, Kei Kurono and Masaru Kato, are run over by a subway train in an attempt to save the life of a homeless drunk who had fallen onto the tracks. Following their deaths, Kurono and Kato find themselves transported to the interior of an unfurnished Tokyo apartment. And, a sphere that are known as “Gantz”, commanded them to kill an alien somewhere in Tokyo … (Quoted from http://en.wikipedia.org/wiki/Gantz).

I like this manga as they have a fine drawing and the nice storyline. But, RM44 per book is not cheap!