At a party, reserved college student Kakeru meets a mysterious and charming young woman who is unable to see.

Kakeru takes Koyuki to try out an old piano and the two tour a Meiji era sailboat that is preserved on campus.

Kakeru and Koharu go to karaoke with friends and decide to check out the university's fireworks club together.

Kakeru and Koharu go on their fireworks shopping trip and then enjoy a very relaxing ride home on a water bus.

Kakeru and his roommate Narumi get a chance to take Koharu and Yuko for a ride on the college's cutter boat.

Kakeru shares an intimate moment with Koharu and then turns to Narumi and Hayase for advice on how to proceed.

After Koharu disappears for a week, Kakeru and Yuko get a clue about where she is and run out to look for her.

Hoping to spend time with Koharu, Kakeru and friends decide to volunteer at the hospital where she is staying.

Still volunteering at the hospital, Kakeru learns more about Koharu's illness and happens to meet her mother.

Kakeru stays with Koharu through her ups and downs while Yuko takes the lead on preparing the fireworks show.

With the fireworks event approaching, Koharu keeps working step by step toward regaining some of her strength.

Kakeru and Koharu enjoy their last moments together before she gets transferred to a new hospital in Hokkaido.