Kyoukai no Kanata, Strike the Blood Recommendations
Both series are similar with a male and female protagonist involved with the supernatural which leads to many action scenes. The female leads are quite similar as they are always with their "sempai" (male protagonist), and believing they are perverts.
Female lead is voiced by the same seiyuu (Risa Taneda), and both frequently address their senpais (i.e. the male leads). Both female leads are also contacted by outside organizations to follow the male lead & possibly kill him.
Both deal with supernatural phenomena, and the male leads contain extraordinary beings within them that grants them great powers. The romantic elements are also similar.
Lots of "senpai" action!
the main character has a special connection with the heroine since both of them is the kouhai of the protagonist.
both of the protagonist has some special power more than the heroine
both of the protagonist considered danger by the surrounding because of their power