I Hear the Sunspot Manga features the beginning story to the series as well as fabulous art by Yuki Fumino.

Because of a hearing disability, Kohei is often misunderstood and has trouble integrating into life on campus, so he learns to keep his distance. That is until he meets the outspoken and cheerful Taichi. He tells Kohei that his hearing loss is not his fault. Taichi’s words cut through Kohei’s usual defense mechanisms and open his heart. More than friends, less than lovers, their relationship changes Kohei forever.

I Hear the Sunspot: Theory of Happiness Manga features story and art by Yuki Fumino.

--he can’t hear . . . ?

Because of a hearing disability Kohei is often alone. Taichi is outspoken and cheerful. At first, Kohei keeps himself well guarded, but after he meets Taichi he slowly learns to open up.