Saiki X Kaidou Wallpapers. Kaidou shun has feelings for saiki, saiki however understands realistically that a relationship with anyone would be unfair, and yet they end up working out an agreement, kaidou gets to act as if saiki's his romantic partner till his feelings wear out' and saiki just has to keep his feelings for kaidou strictly platonic, spoiler alert, neither. Season 1 volume 2 cover.