青い日々にさよならを
[i]Aoi Hibi ni Sayonara wo[/i] (Goodbye to the Blue Days) is an original song by "夏 /Umi":[https://www.youtube.com/@umichannel73]. The original illustration for the PV was made by [[hanako151]]. The song was initially uploaded on "YouTube":[https://www.youtube.com/watch?v=k8-oCmk7yIc] on August 14, 2021.
aoi hibi ni sayonara wo