Tankōbon Volume 9 Special Chapter

TBA (まひろとこどもの日, Mahiro To Kodomo No Hi) is a special full-color chapter of Onimai: I'm Now Your Sister!. It was originally published exclusively in Tankōbon Volume 9 which was released on September 27, 2024.

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Chapters
Main Chapters		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 • 31 • 32 • 33 • 34 • 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43 • 44 • 45 • 46 • 47 • 48 • 49 • 50 • 51 • 52 • 53 • 54 • 55 • 56 • 57 • 58 • 59 • 60 • 61 • 62 • 63 • 64 • 65 • 66 • 67 • 68 • 69 • 70 • 71 • 72 • 73 • 74 • 75 • 76 • 77 • 78 • 79 • 80 • 81 • 82 • 83 • 84 • 85 • 86 • 87 • 88 • 89 • 90 • 91 • 92 • 93 • 94 • 95 • 96 • 97 • 98
0.1 - 0.9 Chapters		1.25 • 1.5 • 5.5 • 6.5 • 8.5 • 9.5 • 10.5 • 12.5 • 15.5 • 18.5① • 18.5② • 18.75 • 21.5① • 21.5② • 21.5③ • 21.5④ • 24.5① • 24.5② • 25.5 • 26.5 • 27.5 • 30.5 • 32.5 • 33.5 • 34.5① • 34.5② • 34.5③ • 36.5 • 37.5 • 38.5 • 40.5 • 41.3 • 41.7 • 42.5 • 43.5 • 46.5 • 47.5 • 48.5 • 50.5 • 51.5 • 53.5 • 54.5 • 56.5① • 56.5② • 58.5 • 62.5 • 63.5 • 66.5 • 69.5 • 71.5 • 74.5 • 78.5 • 81.5 • 82.5 • 85.5 • 88.5 • 90.5 • 91.5 • 92.5 • 93.5 • 95.5
Collected Works Special Chapters		Real Record! Drama CD Report • Mahiro and the After-Travel Party • Mahiro and a Sleepy Day • Mahiro's Weekday Routine • Mahiro and the Visible Undergarmets • 2020 Summer Special Brochure • Mahiro and the Harem • Mahiro and After the Festival • The Boys Are Done For!
Tankōbon Bonus Chapters		Mihari and Her Onii-Chan • Mihari's Wardrobe • Mihari's Wardrobe Afterwards • Miyo's Refusal • Asahi's Innocence • Momiji's Nickname • Kaede's Concern • Mahiro's Lunch • Mihari's Lunch • Asahi and Momiji • Mihari's Skipped Grades • Nayuta's Recent Past • Mahiro and the Photo Albums • Mahiro's Cosplay Round-Table • Mahiro and the Ko-Gal Squad • TBA
Tankōbon Special Chapters		Mahiro's Colorful Life • Mahiro's Anime Time • Miyo and the Enchanted Night • Asahi and Nii-chan • Perfect Onee-chan • Mihari's Research Lab • TBA
EX Special Chapters		Mahiro and the Uneventful Holiday • Later in the Lab • Mahiro is Me and Mihari is Me • Mahiro in a Close Call
Spin-off Special Chapters		A Story Where That Grows • Mihari and the Drinking Party • A Story Where That Grows Part 2
Minato-kun is Done For? Chapters		Minato-kun is Done For? • Offline Meeting Night • Minato-kun is Done For? 1.5 • Minato-kun is Done For? 2
Blu-ray Special Appendix Chapters		Blu-ray Volume 1 Appendix Manga • Blu-ray Volume 2 Appendix Manga
Drama CD Audio Chapters		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15
Anthology Chapters		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 • 31 • 32 • 33 • 34 • 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43 • 44 • 45 • 46 • 47 • 48 • 49 • 50 • 51 • 52 • 53 • 54 • 55 • 56 • 57 • 58 • 59 • 60 • 61 • 62 • 63 • 64 • 65 • 66 • 67 • 68 • 69 • 70 • 71 • 72 • 73 • 74 • 75 • 76
Idol Stuff		1 • 2
Niwasaki Diary		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11