• Book Name: Omae Imouto ja Nakute Iinazuke datta no kayo! Manga
• Alternative(s): You Weren't My Sister, but My Fiancée?!
• Genre(s): Romance Comedy School Life Slice Of Life
• Author(s): Miraijin A
• Year 2022
• Status: Ongoing Download Manga
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Summary: “Humanity, adore my little sister—. I wonder when it started, my sister Kana became distant from me—. Shina Takashi lamented his current days, where being ignored was not uncommon. One day, his parents dropped a shocking revelation. Not only was Takashi not their biological son… but he was also the fiancé of Kana, whom he thought was his sister! From siblings to potential romantic interests, it’s not easy to sort out feelings. The fluctuating emotions, the bewildering distance. Their relationship undergoes an inevitable change—! She’s a sister but not a sister! The curtain rises on a new era of sisterly romantic comedy!” MTL’d from bookwalker.jp