Noe and Hiromi in
True Tears (a certain Pocari Sweat might find this amusing
)
Serious answers:
Kamina and Viral in
Gurren Lagann
Nanoha and Fate in first season
Nanoha, Nanoha and Vita in
Nanoha A's
Battler and Beatrice in
Umineko
Amuro Ray and Char Aznable in
Mobile Suit Gundam
Light and L in
Death Note
Homura and Kyubey in
Madoka Magica
Shana and Hecate in
Shakugan no Shana
Lina Inverse and Naga the White Serpent in
The Slayers
Makoto Mizuhara and Katsuhiko Jinnai in
El Hazard: The Magnificent World