Hitoshi Mukai

One of the NEET Detective Team members. He is an university student, but his appearance is of a elementary school boy. He rarely attends classes and is enrolled to use the university library. He is a military otaku who spends most of time playing survival games and is always wearing model guns and camouflage outfit. Expert on spying devices. His nickname, "Shousa", is Japanese for "major" or "lieutenant commander."

(Source: Wikipedia)