[Edit] Manga Kodomo Bunko Kongetsu no Uta kara Hit Song Collection (#44569)

[Secret Squirrel]

Sources:
http://anison.info/data/source/4094.html

alcredits and cover comes also from this website, as it's no cover scan or picture anywhere.

@MiniYopExplorer

Where did you get the romanized names for all of those kanji names? Some of them are well known with wiki pages, but there are others I can't find. You will either need to post a source for the readings, or change them back to kanji names.