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Momo loves ribbons, the colour pink, and many other things which better suit girls with delicate figures. Yukino, his best friend, was his only support and was also the only person he could enjoy cute things with but even their relationship had broken down... While Momo was in the depths of despair, a voice whispers in his ears... "Shall I grant your wish? If you are willing to fight in this world then I will turn you into a girl."
High school freshman, Aoi Rio, has a secret that can't be told to anyone. He actually watches "Magical Girls" anime! On his way back home after secretly buying anime merchandise as usual, he saves a girl named Sumire who fell from the sky. Sumire is disheartened because she believes her powers are not good enough. After Aoi encourages her by explaining the value of Magical Girls, Sumire asks him to become her Magical Girl instructor!
After becoming a magical girl, Oriko Mikuni befriends other magical girls at her school-and not always on initially positive terms! Complications arise when Oriko's friends, unaware they both know Oriko, fight over a grief seed, leading to someone's death...
I met a Mahou Shoujo; and so began my story. "Then I will become a Mahou Shoujo!" In order to save Hoshi Karen, the Mahou Shoujo who had protected her even while being pursued by tanks. Kokone, who was entrusted with Karen's Grimoire, decides to become that which is acknowledged as a "Calamity" by the world... a Mahou Shoujo!