Regal Blood (Death Note)

Misa Amane is the princess of Japan. Light Yagami needs to marry her, and so does L Lawliet. When Light decides to take overwhelming measures to bring down his competitors, the secrets L's family has been trying so desperately to keep may come undone. Not to mention, just as Misa decides she wants Light, Light realizes who he wants...and it isn't her.

Mainly L x Light. Other pairings are listed inside.