Dakara Boku wa, H ga Dekinai. is an anime series that follows Ryosuke Kaga, a high school student who meets a mysterious girl named Lisara Restall. Upon their meeting, Ryosuke learns that Lisara is a grim reaper, leading to a pact that drains his erotic spirit to fuel her powers. The series combines elements of fantasy, romance, and ecchi as Ryosuke navigates his new reality, trying to help Lisara while dealing with his dwindling spirit.