Cana Alberona and Erza Scarlet scissoring each other similar to this: Image -> Erza on the right side / Cana on the left. Have Erza a bit of public hair in shape of an "E" and Cana's in shape of a "C" / give them pierced nipples. Their pussys should be nicely wet. Give Cana tan lines.

Cana Alberona x Lucy Heartfilia, tribadism position, both girls with tan line.

All the rest (including the title) is artist's choice, surprise me :)