First Contact (ファースト・コンタクト) is a short story in the manga anthology Neo Parasyte F, written and illustrated by Asia Watanabe. It is Case 10 in the volume.
A teenage girl named Luna has coexisted with a parasite she named Belly for three years. As she goes through puberty, Belly does its best to guide her to healthy living habits, though she doesn't make it easy. One day, a new priest named Sol Bird arrives at the religious school Luna attends. Both Luna and Belly are excited to meet him, though for different reasons.