NOTE: Koibito - lover in Japanese only say this to a girlfriend/boyfriend if you truly mean that they are your love, this though is not a suffix & can't be attached to ones name.
STORY:
L lay on his bed watching Light sleep. He was thinking how glad he was that Light was not the real Kira and that he was being controlled. L had managed to help him break free and their relationship had depend and depend until they admitted they loved one another.
"L darling?" Light asked patting his back.
L jumped out his revere and turned to him smiling faintly. He never smiled really. Only for Watari and Light.
"Light-Kun" L smiled and turned kissing him
Light smiled back holding him close.
"What were you thinking?" he asked.
"Of how lucky I am to have you Koibito" he said sighing holding Light close.
Light kissed him deeply at this and they ended up making love all night long.
The next day you would see Light grinning a lot and L walking awkwardly make ow noises.