Rejimiru.

is a Japanese light novel series written by Fujiwara Yu, with illustrations by Kaya Kuramoto. The series began publication on December 10, 2006 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Holiday amusement park. Glass, a first-year high school student with a little reason, is ostensibly a cousin and is in the middle of a date with her senior Akira. However, another abnormal couple appears there-- !? In addition to the lunch box confrontation, sea bathing, and the episode that approaches the mystery of a beauty health teacher (?)