Unknown Anisong, sung by Hori Kyouko in Horimiya episode 2
Edit: okay, turn out I found the song. Here it is. It's the theme song of Hurricane Star, a fictitious anime in the Horimiya universe. In the webcomic, the title of the anime is "魔神戦機天使隊ハリケーンスター". They managed to compose the song for the joke reference to the manga and add it to the anime album song.
when a show shows you the plan the characters made, it means the plan is going to fail
when it doesn't show it, it means the plan is going to go smoothly
Nekopara


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