• Book Name: Kanojo no Inai 365-Hi no Koto Manga
• Alternative(s): Sekirei sequel; Sekirei: 365 days without a girlfriend; Sekirei: 365 days without her
• Genre(s): Ecchi Harem Slice Of Life
• Author(s): GOKURAKUIN Sakurako
• Status: Ongoing Download Manga
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Summary: Spin off of Sekirei. Takes place 365 days before the return of Musubi.