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

Yotsumoji. Kako mo, Mirai mo
よつもじ。~過去も、未来も~

Prequel

Yotsumoji. Kyou mo, Ashita mo
よつもじ。 ~今日も、明日も~
manga

Nakai, who works as an editor, is in love with his assigned writer, Okamura-sensei. On days when they can leave early, they go to sensei's house and spend sweet time together away from work. Their days are filled with the sweet contentment that comes from two mature people who have grown comfortable with each other. (Source: Core Magazine, translated)

Sequel

good morning and good night. I hope I can be with you forever.
Yotsumoji. Ohayo, Oyasumi· よつもじ。~おはよう、おやすみ~
manga

Nakai, an editor, and Okamura, a writer, are a handsome couple with great chemistry in both their professional and private lives. They have been living their own lives at a modest distance, but recently Nakai has been spending more and more time at sensei's house, as he naturally begins to think about a future together...? (Source: Core Magazine, translated)