Mitsuyoshi Tada, a high school student focused on photography, unexpectedly encounters Teresa Wagner, a cheerful foreign girl, while photographing cherry blossoms. Their brief meeting leads to several chance encounters in a single day.
Tada invites Teresa and her companion, Alexandra "Alec" Magritte, to his family's coffee shop after they're caught in the rain. They soon unexpectedly reappear as transfer students at Tada's school, Koinohoshi High.
Teresa and Alec join Tada's photography club, adding to the already quirky dynamic of the group, which includes his friends like Kaoru, Hajime, Hinako, and Kentarou.
Tada's second year of high school becomes significantly more vibrant with these new additions to his friend group, potentially causing him to reconsider his detached view on romance.