夜桜四重奏 ~ホシノウミ~

Yozakura Quartet ~Hoshi no Umi~ (lit. Yozakura Quartet ~Sea of Stars~) is a series of OVAs that covers the Hoshi no Umi arc of the Yozakura Quartet manga. The OVA series consists of three episodes, released alongside manga volumes 9, 10, and 11 on October 8, 2010, April 8, 2011, and November 9, 2011, respectively. Set in Sakurashin, the story follows the members of the Hiizumi Life Counseling Office: Hime, a high school student and town mayor; Kotoha, a user of the power of words; Ao, a cat-eared girl; and Akina, an ordinary human. They face various strange incidents and new challenges. In ~Hoshi no Umi~, the appearance of a new character, Rin, sparks a series of conflicts, as a mysterious character named Zakuro appears, attempting to take Rin away. To protect their friend, the members of the Hiizumi Life Counseling Office must stand up and confront these new threats to safeguard the peace of their beloved town.