Four Letters: past, future, I wish to be with you

Nakai, an editor, and Okamura, a writer, are a loving couple who get along well in their private life. Their days together are usually peaceful, but they can get jealous over the slightest thing, and sometimes they get a bit more daring than usual when they have a little too much to drink.... Their feelings for each other only grow in intensity...? (Source: Core Magazine, translated)