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My Lovey-Dovey Wife Is a Stone Cold Killer
	First tankōbon volume cover
拝啓…殺し屋さんと結婚しました; (Haikei... Koroshiya-san to Kekkon Shimashita)
Genre	Romantic comedy
Manga
Written by	Donten Kōsaka
Published by	Media Factory
English publisher	NA: Seven Seas Entertainment;
Magazine	Comic Cune
Demographic	Seinen
Original run	September 27, 2019 – present
Volumes	7

My Lovey-Dovey Wife Is a Stone Cold Killer (拝啓... 殺し屋さんと結婚しました, Haikei... Koroshiya-san to Kekkon Shimashita), also known as Dear Sir... I Married a Killer, is a Japanese manga series written and illustrated by Donten Kōsaka. It began serialization in Media Factory's Comic Cune magazine in September 2019, and has been compiled into seven volumes as of September 2024. The series is licensed in North America by Seven Seas Entertainment.

Plot

The series follows a salaryman who recently married Setsuna, a professional assassin. Having only dated for a short time prior to their marriage, he is surprised to learn of her background. Despite this, he comes to accept her work. The story follows the couple as they balance married life with Setsuna's job as a hitman.

Characters

Husband (旦那, Danna): Voiced by: Yūya Hirose (vomic)^[1]; The unnamed protagonist, he is a salaryman who met Setsuna after they were introduced by a mutual friend. Because they only met a few times before they started dating, he did not know about her job as an assassin. Although they are already a couple, he is still not used to married life.

Setsuna (せつな): Voiced by: Marika Kōno (vomic)^[1]; A professional assassin who had just recently married. She met her husband after their mutual friend invited them to a drinking party. She is proficient both as a hitman and at household chores. Because of her work, she assumes a cold personality, although she warms up as her relationship with her husband develops.

Otonari-san (音成さん): Voiced by: Mai Fuchigami (vomic)^[1]; Setsuna and her husband's next-door neighbor. Her name is a play on the Japanese word for next-door neighbor, otonari-san (お隣さん).

Publication

The series is written and illustrated by Donten Kōsaka. It began serialization in the November 2019 issue of Media Factory's Comic Cune magazine, released on September 27, 2019.^[2] The first tankōbon was released on May 27, 2020. The series has been compiled into seven volumes as of September 27, 2024.^[3] A voiced comic video was posted on YouTube on September 27, 2021, to commemorate the release of the third volume.^[1]

The series is licensed in North America by Seven Seas Entertainment,^[4] with the first English volume being released on November 23, 2021.

No.	Original release date	Original ISBN	English release date	English ISBN
1	May 27, 2020^[5]	978-4-04-064617-6	November 23, 2021^[6]	978-1-64827-680-4
2	January 27, 2021^[7]	978-4-04-680101-2	March 1, 2022^[8]	978-1-63858-142-0
3	September 27, 2021^[9]	978-4-04-680746-5	July 19, 2022^[10]	978-1-63858-342-4
4	June 27, 2022^[11]	978-4-04-681440-1	April 25, 2023^[12]	978-1-63858-837-5
5	February 27, 2023^[13]	978-4-04-682145-4	October 24, 2023^[14]	979-8-88843-029-3
6	November 27, 2023^[15]	978-4-04-683030-2	May 21, 2024^[16]	979-8-88843-768-1
7	September 27, 2024^[3]	978-4-04-683958-9	May 13, 2025^[17]	979-8-89160-646-3