Gantz by Hiroya Oku was published between 2000-2013 and comprises 37 volumes, each containing over 200 pages. It’s a massive, basically insane science fiction drama. Acts of over the top cruelty are matched by exceptional acts of courage. Emotions and actions are amplified, intensified. The scene below is taken from volume 30 (plus a couple of pages from volume 29), fairly near the end of the manga. It shows a group of humans arriving at the alien mothership.
They don’t know what to expect or what destiny awaits them on board. The armed character in black clothing is Kei Kurono, a protagonist, who is looking for his girlfriend Tae.
fyi the pages below are in Japanese reading direction, top to bottom and right to left.