Ijippari na Senpai no Shitsukekata

Sub Makino was molested during his commute to work. He was being commanded by an unknown Dom and was unable to resist. Another Dom noticed something was wrong and saved him just in the nick of time. When Makino managed to get to work, he was greeted by the department manager and a newly appointed person—the Dom who had just saved him, Nagao.

(Source: Kadokawa, translated)