Hoshizora wo Mitsumeta Sono Ato de

It all started with a job. When wheelchair-bound Subaru Miyazawa decides to visit the planetarium after finishing its brochure design, he unexpectedly bumps into Togo Awase, the photographer involved in the project. Although he'd admired his work, he never thought he'd see the man himself—or that Togo would go so far as to carry Subaru down the steps to view the starry night sky up close. Subaru could only hope they would meet again...
(Source: Yen Press)
Note: The chapter count includes 4 bonus chapters.