| Ja Kanji: | ガイシューイッショク！ |
| Genre: | Erotic comedy[1] |
| Type: | manga |
| Publisher: | Shogakukan |
| Imprint: | Big Superior Comics |
| Magazine: | Big Comic Superior |
| First: | May 26, 2017 |
| Volumes: | 5 |
is a Japanese manga series written and illustrated by . It has been serialized in Shogakukan's manga magazine Big Comic Superior since May 2017.
Hiromi Komori, who works at a real estate agency, is visited by Michiru Sakai, who is looking for a place to stay. However, Michiru has no income and no guarantor. Though Komori sincerely tries to find him a place, they fail. Her boss tells her to "make the cheap customers leave early" and Komori urges Michiru to come up with a compromise, but he arrogantly rejects her offer and tells her to get to work. In anger, Komori says that if he wants to have a place to stay, he needs to work, and if he does not like it, he should stay in her spare room. Michiru runs out in anger but fails to become a customer of any other real estate agent and forces Komori to accept him by taking her phone and fabricating threatening material. From there they begin their strange cohabitation life.
Written and illustrated by, Gaishū Isshoku! debuted in Shogakukan's manga magazine Big Comic Superior on May 26, 2017.[2] Shogakukan has collected its chapters into individual volumes. The first volume was released on June 29, 2018.[3] As of April 28, 2023, five volumes have been released.