The Hikikomori, a romance by Bruce Allsman

A factory manager in Bayan Lepas, Hideo Saito, a bachelor in his mid fifties, is a hikikomori and a porn addict who is a Japanese expatriate living in Penang. One day, he meets a lovely Japanese woman in her early forties who had just moved into a condominium unit on the same floor as his unit, and he feels that the woman bears a strong resemblance to his favorite AV idol, Mariko Ozawa. When he finds out that she is the AV idol of his dreams, he accepts gladly her invitation to tea, but he meets Miyagi, her uncle, an elderly Yakuza member who questions his intention toward Mariko and warns him to behave.