At the local Oda Nouvelle Mall, Kouichi "Cherry" Sakura is working at an elderly care center for summer break. Cherry is a quiet and reserved boy who prefers to write haikus to express his feelings but struggles with reciting them in front of an audience. Amidst a chaotic chase between delinquent Beaver and the mall security, Cherry accidentally swaps phones with Smile, an online influencer who wears a face mask to hide her buckteeth.