left panel :
Shirou Emiya (Fate UBW) x Erza (Fairy Tail) : Erza is getting fucked by Shirou in the standing up position as referenced below. The pic should be more at a level angle instead of the angle pointing up in the picture. Shirou has a massive cock. Which is 16-18 (41 - 46 cm) inches in length. They both are full nude. Emphasis on the penetration and erzas tits. Vaginal Penetration. Also they should be positioned more side by side instead of on top of each other.
right panel: Natsu (Fairy Tail) x Rin (Fate UBW) : Rin is getting fucked by natsu in the laying down position as referenced below. Natsu also has a massive cock at 16-18 (41 - 46 cm) inches in length. They both are full nude. Emphasis on the penetration and rins tits. Also make rins tits slightly larger than what is in the show. Vaginal Penetration.