Contains Volumes 1-4 of Blue Sky Complex doujin series: Indigo Blue no Gradation and extras.

-dj #1(2017/3): Takes place during summer break. Terashima asks Narasaki to go to his home to have sex.

-after #1 (2018/8): From Ichikawa's Twitter

-dj #2(2017/10): Narasaki and Terashima had their university entrance ceremony and they're both wearing suits.

-dj #3(2018/3): Narasaki getting worked up over Terashima's new haircut.

-after #3: extra

-電話 (2018/12): Denwa / Phone Call

-美里さんの話 (2018/12): Misato-san no Hanashi / Misato-san's Story

-dj #4(2018/10): Terashima was forced to tag along with Narasaki's family to a theme park and the two spent the night together in their fairytale-themed hotel room.

-after #4: extra

-鼻血 (2018/12): Hanaji / Nosebleed

-中学3年生夏休みの時の話 (2018/12): Chuugaku Sannensei Natsuyasumi no Toki no Hanashi / The Summer Holidays of Third Year of Middle School

-ランドセル (2018/12): Randoseru

-Afterword