Season 1

Saki reflects on her feelings for Yuuta in her diary. A trip to the waterpark leads Yuuta to a realization. After battling her thoughts, Saki decides how their relationship should progress.

Saki adjusts to her new job over summer vacation. Taichi and Akiko notice that Yuta and Saki keep calling each other by their family names.

Shiori invites Yuta to a late showing of a movie adaptation of a book she enjoys. Saki takes an interest and goes to the bookstore the next day, where she meets Shiori for the first time.

A month has passed since Yuta and Saki started living together. As Yuta starts to understand the ambiguity of their relationship, Saki asks him for help studying modern literature. The two work together to prepare Saki for a test retake.

Yuta and Saki navigate their new life together, making mistakes along the way. As they learn from their missteps, Saki's feelings toward Yuta become increasingly uncertain.

At school, Yuta notices that there are some sensational rumors circulating about Saki due to her striking appearance. When he tries to talk to her about it, it quickly becomes clear that there is much more to the story than the rumors suggest.

High school student Yuta Asamura's life changes when his father remarries, moving in with stepsister Saki Ayase and her mother. Despite cautious values, Yuta and Saki navigate their new living situation while maintaining boundaries.