a funny idea I had: what if, on the way to Necropolis, Verus fucked Arka in a skeletal boat on the dark river. lol
it's not strictly an ancient Greek-style underworld (Cerberus makes an appearance though ;) ). There's some ancient Egyptian and other cultural influences in there too. As mortals, Verus and whoever he brings are able to visit Necropolis and the underworld with a spell - it's more for Jet / Arka / the second party's safety though, Verus being a necromancer and all.
panel 1: (Arka looks in awe of the scenery.)
panel 2: Verus: Are you enjoying the boat ride, Arka?
Arka: Yes. It's a lot more beautiful than I expected!
Verus: We have quite a while until we reach Necropolis...
panel 3, 4: (they kiss)
panel 5: Verus: Shake your bones for me, boy.
panels 6, 7: (offscreen sex noises)