Through Ninako Kinoshita's eyes, it appears that everyone understands what love is. Even regarding her own feelings for her childhood friend Daiki Korenaga, it is her friends who confirm she is in love. However, a seed of doubt sprouts in her heart when Ren Ichinose, a handsome school idol, accidentally breaks Ninako's phone charm on the train. His sincere promise to make amends touches Ninako, and she wonders if this is what true love feels like. Love is like an apple: its exterior may seem sweet, but its taste can be misleading. For Ninako, she encounters the bitterness of unrequited love for the first time. Yet, as her perceptive friends navigate various romantic experiences, Ninako struggles to grasp its complex flavor and fails to notice how a certain someone looks only at her.