Dokyuu Hentai HxEros: HxEros Report

The series follows Takeru Kusanagi, a high school student who's struggling to find his place. He's recruited by Moe Amagasa, the president of the school's HxEros club, a group dedicated to battling the "H" (H-eros), malevolent entities that prey on women's "h" (h-value), a measure of their purity. The HxEros use their unique abilities, known as "H-cells," to fight these monsters and protect their female classmates.