My Friend's Little Sister Has It In for Me!

My Friend's Little Sister Has It In for Me! (友達の妹が俺にだけウザい, Tomodachi no Imōto ga Ore ni Dake Uzai) is Japanese light novel series written by Ghost Mikawa and illustrated by Tomari. The series began publication by SB Creative under their GA Bunko imprint in April 2019. The light novel is licensed in North America by J-Novel Club. A manga adaptation by Hira Hiraoka began serialization online in December 2019. An anime television series adaptation produced by Blade has been announced.

My Friend's Little Sister Has It In for Me!
First light novel volume cover featuring Iroha Kohinata
友達の妹が俺にだけウザい (Tomodachi no Imōto ga Ore ni Dake Uzai)
Genre	Romantic comedy[1]
Light novel
Written by	Ghost Mikawa
Illustrated by	Tomari
Published by	SB Creative
English publisher	NA: J-Novel Club
Imprint	GA Bunko
Demographic	Male
Original run	April 15, 2019 – present
Volumes	10
Manga
Written by	Ghost Mikawa
Illustrated by	Hira Hiraoka
Published by	Square Enix
English publisher	NA: Comikey Square Enix
Magazine	Manga Up!
Demographic	Shōnen
Original run	December 13, 2019 – present
Volumes	8
Anime television series
Directed by	Kazuomi Koga
Written by	Touko Machida
Studio	Blade

Plot

Characters

Akiteru Ōboshi (大星 明照, Ōboshi Akiteru)

Voiced by: Haruki Ishiya^[2]

Akiteru is a second year high school student. In the series, Akiteru calls himself a well-rounded average student but still has a hidden side to him.

Iroha Kohinata (小日向 彩羽, Kohinata Iroha)

Voiced by: Sayumi Suzushiro^[2]

Iroha is Akiteru's best friend's younger sister. In the story, Iroha is a bright, kind, and beautiful honor student. She is described as an excitable person who cannot read the atmosphere. She aims to become a voice actress.

Mashiro Tsukinomori (月ノ森 真白, Tsukinomori Mashiro)

Voiced by: Tomori Kusunoki^[2]

Mashiro is a second year high school student, classmate and cousin of Akiteru. She is childhood friends with Akiteru and often played with him when they were younger. In the story, Mashiro is described as a gentle person when meeting strangers with a cold demeanor towards Akiteru. She speaks in the third-person. She is also a popular novelist.

Ozuma Kohinata (小日向 乙馬, Kohinata Ozuma)

Voiced by: Soma Saito^[2]

Ozuma is a second year high school student. In the story, Ozuma is a kind and caring person. He is described as "beautiful like a prince" and is a genius programmer. Ozuma is Akiteru's only friend and has absolute faith in Akiteru due to some past events.

Sumire Kageishi (影石 菫, Kageishi Sumire)

Voiced by: Kana Hanazawa^[2]

Sumire is Akiteru's subject teacher. She is described as a ruthless guidance and has a poisonous tongue. She secretly works as an illustrator.

Midori Kageishi (影石 翠, Kageishi Midori)

Voiced by: Reina Kondō^[3]

Midori is Sumire's little sister.

Media

Light novels

The light novel series is written by Ghost Mikawa and features illustrations by Tomari. It is published by SB Creative under their GA Bunko imprint, with the first volume being released on April 15, 2019; ten volumes have been released as of October 2022.^[4] The series is licensed in English by J-Novel Club.^[5]

No.	Original release date	Original ISBN	English release date	English ISBN
1	April 12, 2019[6]	978-4-8156-0187-4	February 10, 2021 (digital)[7] December 7, 2021 (print)[8]	978-1-71-832680-4
2	July 12, 2019[9]	978-4-8156-0277-2	April 23, 2021 (digital)[10] February 1, 2022 (print)[11]	978-1-71-832681-1
3	November 14, 2019[12]	978-4-8156-0427-1	July 9, 2021 (digital)[13] March 29, 2022 (print)[14]	978-1-71-832682-8
4	March 13, 2020[15][16]	978-4-8156-0480-6 978-4-8156-0479-0 (SE)	October 29, 2021 (digital)[17] May 24, 2022 (print)[18]	978-1-71-832683-5
5	August 6, 2020[19]	978-4-8156-0623-7	January 14, 2022 (digital)[20] August 2, 2022 (print)[21]	978-1-71-832684-2
6	December 10, 2020[22][23]	978-4-8156-0781-4 978-4-8156-0780-7 (SE)	April 15, 2022 (digital)[24] January 17, 2023 (print)[25]	978-1-71-832685-9
7	March 12, 2021[26][27]	978-4-8156-0783-8 978-4-8156-0782-1 (SE)	July 8, 2022 (digital)[28] April 18, 2023 (print)[29]	978-1-71-832638-5
8	August 12, 2021[30][31]	978-4-8156-1014-2 978-4-8156-1013-5 (SE)	October 7, 2022 (digital)[32] August 8, 2023 (print)[33]	978-1-71-832640-8
9	January 15, 2022[34][35]	978-4-8156-1227-6 978-4-8156-1226-9 (SE)	January 12, 2023 (digital)[36] June 11, 2024 (print)[37]	978-1-71-832688-0
10	October 15, 2022[38][39]	978-4-8156-1600-7 978-4-8156-1599-4 (SE)	August 4, 2023 (digital)[40]	978-1-71-832644-6
11	March 15, 2025[41]	978-4-8156-1912-1	—	—

Manga

A manga adaptation by Hira Hiraoka began serialization in Square Enix's Manga Up! online web service on December 13, 2019 and has been compiled into eight tankōbon volumes as of July 2024.^[2] The manga is published in North America by Comikey and Square Enix through the global version of Manga Up!.

No.	Japanese release date	Japanese ISBN
1	August 6, 2020[42]	978-4-75-756754-2
2	November 7, 2020[43]	978-4-75-756929-4
3	June 7, 2021[44]	978-4-75-757298-0
4	January 7, 2022[45]	978-4-75-757550-9
5	July 7, 2022[46]	978-4-75-758011-4
6	February 7, 2023[47]	978-4-75-758388-7
7	September 7, 2023[48]	978-4-75-758770-0
8	July 5, 2024[49]	978-4-75-759288-9

Anime

An anime television series adaptation was announced during a livestream for the "GA Fes 2021" event on January 31, 2021, with the cast of the series' drama CDs reprising their roles.^[2] At the "GA Fes 2024" livestream event on March 10, 2024, it was announced that the series will be produced by Blade and directed by Kazuomi Koga, with Touko Machida handling the series composition, and Katsuyuki Sato serving as the character designer.^[50]

See also

• Days with My Stepsister, a mixed-media project by the same author.
• Spy Classroom, another light novel series illustrated by the same illustrator.

References

1. Harding, Daryl (January 31, 2021). "Kohai Rom-Com My Friend's Little Sister Has It In for Me! Light Novel Gets TV Anime". Crunchyroll. Retrieved October 15, 2022.
2. "My Friend's Little Sister Has It In for Me! Novels Get TV Anime". Anime News Network. January 31, 2021. Retrieved January 31, 2021.
3. My Friend's Little Sister Has It In for Me! Official [@imouza_PR] (March 10, 2024). メインキャストはドラマCDからもちろん続投です☆ (Tweet) (in Japanese). Retrieved March 10, 2024 – via Twitter.
4. "友達の妹が俺にだけウザい" (in Japanese). SB Creative. 29 March 2019. Retrieved January 31, 2021.
5. "J-Novel Club Adds 5 Light Novels, 2 Manga". Anime News Network. November 14, 2020. Retrieved January 31, 2021.
6. 友達の妹が俺にだけウザい (in Japanese). SB Creative. Retrieved July 14, 2020.
7. "My Friend's Little Sister Has It In for Me! Volume 1". J-Novel Club. Retrieved November 21, 2021.
8. "My Friend's Little Sister Has It In for Me! Volume 1 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
9. 友達の妹が俺にだけウザい2 (in Japanese). SB Creative. Retrieved July 14, 2020.
10. "My Friend's Little Sister Has It In for Me! Volume 2". J-Novel Club. Retrieved November 21, 2021.
11. "My Friend's Little Sister Has It In for Me! Volume 2 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
12. 友達の妹が俺にだけウザい3 (in Japanese). SB Creative. Retrieved July 14, 2020.
13. "My Friend's Little Sister Has It In for Me! Volume 3". J-Novel Club. Retrieved November 21, 2021.
14. "My Friend's Little Sister Has It In for Me! Volume 3 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
15. 友達の妹が俺にだけウザい4 (in Japanese). SB Creative. Retrieved July 14, 2020.
16. 友達の妹が俺にだけウザい4 ドラマCD付き特装版 (in Japanese). SB Creative. Retrieved July 14, 2020.
17. "My Friend's Little Sister Has It In for Me! Volume 4". J-Novel Club. Retrieved November 21, 2021.
18. "My Friend's Little Sister Has It In for Me! Volume 4 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
19. 友達の妹が俺にだけウザい5 (in Japanese). SB Creative. Retrieved July 14, 2020.
20. "My Friend's Little Sister Has It In for Me! Volume 5". J-Novel Club. Retrieved November 21, 2021.
21. "My Friend's Little Sister Has It In for Me! Volume 5 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
22. 友達の妹が俺にだけウザい6 (in Japanese). SB Creative. Retrieved July 14, 2020.
23. 友達の妹が俺にだけウザい6 小冊子付き特装版 (in Japanese). SB Creative. Retrieved July 14, 2020.
24. "My Friend's Little Sister Has It In for Me! Volume 6". J-Novel Club. Retrieved January 24, 2022.
25. "My Friend's Little Sister Has It In for Me! Volume 6 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved April 15, 2022.
26. 友達の妹が俺にだけウザい7 (in Japanese). SB Creative. Retrieved July 14, 2020.
27. 友達の妹が俺にだけウザい7 ドラマCD付き特装版 (in Japanese). SB Creative. Retrieved July 14, 2020.
28. "My Friend's Little Sister Has It In for Me! Volume 7". J-Novel Club. Retrieved April 15, 2022.
29. "My Friend's Little Sister Has It In for Me! Volume 7 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved September 7, 2022.
30. 友達の妹が俺にだけウザい8 (in Japanese). SB Creative. Retrieved July 14, 2020.
31. 友達の妹が俺にだけウザい8 ドラマCD付き特装版 (in Japanese). SB Creative. Retrieved July 14, 2020.
32. "My Friend's Little Sister Has It In for Me! Volume 8". J-Novel Club. Retrieved July 4, 2022.
33. "My Friend's Little Sister Has It In for Me! Volume 8 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved February 1, 2023.
34. 友達の妹が俺にだけウザい9 (in Japanese). SB Creative. 30 November 2021. Retrieved January 14, 2022.
35. 友達の妹が俺にだけウザい9 ドラマCD付き特装版 (in Japanese). SB Creative. 30 November 2021. Retrieved January 14, 2022.
36. "My Friend's Little Sister Has It In for Me! Volume 9". J-Novel Club. Retrieved February 1, 2023.
37. "My Friend's Little Sister Has It In for Me! Volume 9 (Paperback)". Barnes & Noble. J-Novel Club. Retrieved August 7, 2023.
38. 友達の妹が俺にだけウザい10 (in Japanese). SB Creative. July 2022. Retrieved August 13, 2022.
39. 友達の妹が俺にだけウザい10 小冊子『10.5巻』付き特装版 (in Japanese). SB Creative. July 2022. Retrieved August 13, 2022.
40. "My Friend's Little Sister Has It In for Me! Volume 10". J-Novel Club. Retrieved July 9, 2023.
41. 友達の妹が俺にだけウザい11 (in Japanese). SB Creative. 5 December 2023. Retrieved December 8, 2023.
42. 友達の妹が俺にだけウザい 1 (in Japanese). Square Enix. Retrieved July 14, 2021.
43. 友達の妹が俺にだけウザい 2 (in Japanese). Square Enix. Retrieved July 14, 2021.
44. 友達の妹が俺にだけウザい 3 (in Japanese). Square Enix. Retrieved July 14, 2021.
45. 友達の妹が俺にだけウザい 4 (in Japanese). Square Enix. Retrieved January 19, 2022.
46. 友達の妹が俺にだけウザい 5 (in Japanese). Square Enix. Retrieved July 4, 2022.
47. 友達の妹が俺にだけウザい 6 (in Japanese). Square Enix. Retrieved February 1, 2023.
48. 友達の妹が俺にだけウザい 7 (in Japanese). Square Enix. Retrieved September 1, 2023.
49. 友達の妹が俺にだけウザい 8 (in Japanese). Square Enix. Retrieved June 25, 2024.
50. "My Friend's Little Sister Has It In for Me! Anime Unveils Main Staff". Anime News Network. March 10, 2024. Retrieved March 10, 2024.

External links

• Light novel official website (in Japanese)
• Manga official website (in Japanese)
• My Friend's Little Sister Has It In for Me! (light novel) at Anime News Network's encyclopedia