謎の彼女X 謎の夏祭り

Mysterious Girlfriend X is a Japanese manga series created by Riichi Ueshiba, revolving around the unusual romantic relationship between high school student Akira Tsubaki and the mysterious transfer student Mikoto Urabe. Mikoto has the ability to convey her emotions and understand others' feelings through her saliva. The story focuses on their 'saliva bond,' portraying their sweet yet bizarre romantic daily life. 'Mysterious Summer Festival' is an original video animation (OVA) in the series, released on August 23, 2012, depicting the special events that Tsubaki and Urabe experience during a summer festival. The anime adaptation consists of 13 episodes, broadcast from April to June 2012, and licensed in North America by Sentai Filmworks. With its unique premise and refreshing art style, it depicts the subtle emotional changes between young men and women in their adolescence, gaining attention for its unusual 'saliva' concept. The work also includes spin-off light novels and related merchandise.