The advertising poster appears over and over again. The model is holding a crystal apple, and reads "True love never runs smooth" symbolizing the relationship between Riko and Teppei, which constantly faces struggles from when they meet for the very first time to the love triangle. This advertisement is visible everywhere from the park to Teppei's 30-year-old refrigerator, as "True love never runs smooth" is the unofficial tagline of this television series.