Hatsune savors a rare cruise vacation with Sensei, who has been occupied elsewhere, and follows his playful suggestion to wear a striking swimsuit while enjoying the sea air. His encouragement to form new friendships among her peers fills her with quiet delight amid their shared moments. At school, lively Shizuka meets the poised Hatsune and quickly warms to her, captivated by her storybook elegance. Intrigued by the prospect of encountering Hatsune’s father, a respected legislator, Shizuka sets out to visit them both.