When Hiyori⁠—a young girl whose deceased father taught her the joys of fishing⁠—headed out to sea for some alone time, she never thought that she would encounter another girl there. After a while, this girl⁠—named Koharu⁠—and her end up fishing and cooking together, and they get to know each other a bit in the meantime. During their brief time together Koharu finds out that the reason Hiyori went out to sea that day was because she's hesitant towards meeting her new step family that same evening. But what a coincidence! Koharu is also meeting her new family tonight! "No. It can't be a coincidence..." Follow these two 'sisters' and their new life together!

Having attended Mihama Academy for about a year, Yuuji Kazami has seemingly found his place within the school, but he suddenly decides to pursue a promotion in CIRS. After consulting JB about his intentions, they both thoroughly examine Yuuji's documents and dissect the events of his upbringing to determine if the job is fit for him. Meanwhile, unbeknownst to the two, the girls of Mihama uncover some torn documents in Yuuji's room. After restoring the papers, they discover the story that has formed—or perhaps broken—Yuuji into the man he is today. However, what was thought to be history has haunted him to the present, and the chains of the past begin to drag him back into the darkness... [Written by MAL Rewrite]

Special bundled with the Blu-ray/DVD volume of Grisaia no Meikyuu.

The story follows three 15-year-old boys who go to a prestigious horse racing academy to become jockeys. The three-year academy is 10 to 20 times harder to enter than most schools, and whoever wishes to enter must pass an academic, physical, and fitness test. Formerly a member of an idol group winning fans and fame, Yuu Arimura sets out to meet what his heart desires after becoming enamored with horse racing. Having grown up on an island, Shun Kanami has always yearned to ride with horses. Amane Grace was born in England and is lost in the path his parents have set for him, but he still takes on his dream.