Kekkon Itsuka Anata to... (Light Novel)

is a Japanese light novel series written by Raita Okura, with illustrations by Youko Takanori. The series began publication on September 10, 1996 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Seimi Arai, Minatsu Kato, Mami Shimura, Reiko Takashiro, and Shizuka Nakamoto have successfully graduated from high school and are now 25-year-old women who are on their way. However, the five friends continue to be friends, and they are also single with each other. One day, Shizuka made a match as "a substitute for Reiko." Her partner is Wataru Kashihara, the son of the president of Takashiro Concern affiliated company. She is fascinated by a refreshing and straightforward young man, but in the end she has to make a substitute and refuse. After that, the two who happened to meet again in Harajuku, while misunderstanding and lying, repeated dates and left memories through a common hobby. The long-awaited novelization of the popular game.