Rent-a-Girlfriend Season 4 is a oNA (web) anime that premiered in summer 2025, produced by TMS Entertainment.

About the production: the story comes from a manga, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy and romance, with themes such as Fake Relationship, Primarily Adult Cast, Female Harem and Heterosexual.

On AniList, Rent-a-Girlfriend Season 4 has an average score of 60%, an average score, and appears on 38,963 users' lists.

The franchise continues in or follows from: Kanojo, Okarishimasu 3rd Season and Kanojo, Okarishimasu 5th Season.

Kazuya’s ready to confess with the lush paradise of Hawaii as a backdrop. But renting Chizuru for the dream trip turns into a war zone of love due to Ruka’s aggressive advances and Mami’s scheming. Despite the chaos, this is Kazuya’s moment to bare his heart. Will his words reach Chizuru? And if they do, what will she even say? (Source: Crunchyroll) Note: Kanojo, Okarishimasu 4th Season was streamed 4 days in advance of the TV broadcast on DMM TV, dAnimestore, and Crunchyroll beginning July 1, 2025. Regular broadcasting began on July 5, 2025.

Official synopsis from AniList.