Starring Seiya, Thanatos and Hypnos, with the special appearence of Cancer Manigoldo Saint Seiya by Masami Kurumada Parody from volume 27 [link] The flashback, of course, is a scene from The Lost Canvas, chapter 64: [link]
It's really hilarious Thanatos finally call him out on ditching every time there a confrontation. Hypnos is so fed up on lecturing his twin, he went " blah, blah" either that Thanatos decided to tune him out XD.