Yosuga no Sora: In Solitude, Where We Are Least Alone., Amagami SS+ Plus Recommendations
-Both animes's setting/story goes by an omnibus format, and have small arcs for each heroine that doesn't diverge from the central plot of the story (with the setting intact)
Amagami SS and Yosuga no Sora are presented in omnibus harem format, with each girl having their own "good end" in her arc, therefore allowing male lead to "end up with" all main heroines without girls turning into yandere and fight with each other. In amagami, each girl takes up exactly 4 episodes, and the story takes place in the same time. In Yosuga no Sora, each arc takes up either 2 or 3 episodes, and the events occur in a chronological, but alternative world, order. BEWARE that there is incest in yosuga.