The Four Seasons Around Phantom Suns

A promising newcomer stage actor, Amatsuka Shiki, is discovered by a heavyweight figure in the theater world and meets Kurono Miyuki, who has that influential figure as her father, at the theater company "Genbi." Through his days with Miyuki—a talented yet somehow elusive person—Shiki begins to touch upon the depths of acting. Eventually, Shiki realizes that his feelings for Miyuki are intense romantic love that goes beyond mere admiration. This is bromance-flavored rather than a romantic relationship, but romantic feelings are present. Also posted on Kakuyomu.