Gin's manga / #ghost(12)

Kentarou is a plain, nondescript college student who has never had a girlfriend or any friends. After getting hit on the head by a wayward ball, he begins to notice that there are increasingly long periods of time in which he cannot remember what he was doing. One afternoon, he regains consciousness in an apartment he'd never being to before - and sitting next to him is a young man who then tells him "You're being possessed by the spirit of my dead girlfriend."

With the help of a friendly ghost, Masaki, Ono-sensei can examine his young patient's teeth without much fuss. It seems that only Ono-sensei and children can see Masaki. He brings a calming presence, which is convenient for children at the dentist and for Ono-sensei as well. But is he really a ghost? He doesn't remember much about his past but for some reason, he's very attached to Ono-sensei. So much so that Masaki hangs out around the office and even walks Ono-sensei home. Once they reach the entrance to Ono-sensei's apartment however, Masaki is asked to stay out. Ono-sensei doesn't want Masaki to know that something else haunts him behind closed doors.