That Nerd is my Brother in Law Season 2 - In Kyana Aitsu ga Giri no Ani!? Season 2

Synopsis

Hinata and Mizuki, step-siblings, became lovers and began living together right after graduating from high school. As time passes, Mizuki goes on to graduate school, while Hinata enters the workforce. However, stepping into different worlds gradually causes a rift to form between them. Furthermore, the presence of Hinata’s boss, Kamiki Kyota, begins to cast a shadow over their relationship. Hinata finds his heart wavering toward Kamiki, who is strict yet caring toward his juniors, and Mizuki does not miss this subtle change. “Student” and “working adult”—a small yet significant divide stands between them.