Crocodile and Shanks from One Piece.
Setsuna and Konoka from Negima.
Nanoha and Fate from Lyrical Nanoha.
Noriko and Shimako from Marimite.
Tomoe and Miya from Mai-Otome.
WARNING: Mildly NSFW
Ranka and Sheryl from Macross Frontier.
Ritsu and Mio from K-On.
Kairi and Namine from Kingdom Hearts.
FF, Jolyne, and Hermes from JJBA.
Hibiki and Miki from Idolmaster.
Hiro and Sae from Hidamari Sketch.
Anemone and Eureka from Eureka 7.
Official art (?)
Lal’c and Nono from Diebuster
RGB put the moves on Rikka.
Sakura and Tomoyo from CCS.