I'll See You Tomorrow

After a night of drinking alone, Kimura wakes up in a house he doesn't recognize. The owner, Kunishima, had found him passed out and taken him in to recover. Kunishima's calm presence and comforting home give Kimura a sense of peace he hadn't felt in a long time. When the two unexpectedly reunite at work as partners on a new project, they begin to grow closer. Little by little, Kunishima becomes irreplaceable to Kimura, but...

(Source: Homesha, translated)

Note: Includes one extra chapter.