Mayu's been dating someone for almost a year, but she hasn't told a soul. That's because the classmate she's been seeing is a girl, Rina. Mayu, who until now only had experience dating boys, finds herself caught between her daydreams of strolling through town on dates with Rina and her worries about a society that might still view a young lesbian couple with prejudice. Mayu's navigational skills are about to be put to the test on the unfamiliar waters of same-sex romance.