Yagate Kimi ni Naru: Saeki Sayaka ni Tsuite  

Bloom Into You: Regarding Saeki Sayaka, やがて君になる 佐伯沙弥香について, Bloom Into You Regarding Sayaka Saeki, 終將成為妳 關於佐伯沙彌香

The story focuses on Sayakas past. In the first part, while still in elementary school, Sayaka has her first experience with romantic feelings when she meets a free-spirited girl in her swimming class. The second part explores Sayakas relationship with her senpai in junior high school and the fallout of its ending, as briefly explained in the manga.(Source: Yagate Kimi ni Naru Wiki)

Yagate Kimi ni Naru: Saeki Sayaka ni Tsuite has been licensed by Seven Seas Entertainment.