Anisong unit ClariS has posted a music video for their upcoming 29th CD single song "Umitsuki" on their official YouTube channel . The pop tune is now featured as the opening theme for the summer 2025 TV anime Rent-a-Girlfriend Season 4 . This is the first time that ClariS has performed a theme song for the Rent-a-Girlfriend anime series. "UmitsukI" is also their first anime theme song work as a three-member unit. Karen, a former member of ClariS, graduated from the unit after her final concert in Osaka on November 10, 2024. Since January 2025, ClariS has performed as a three-member unit consisting of the only remaining founding member, Clara, and two new members, Elly and Anna. ClariS "Umitsuki" Music Video Rent-a-Girlfriend Season 4 Creditless Opening Video As their first CD single as a three-member unit, "Umitsuki" will release in Japan on August 20, 2025. Prior to the CD release, the title tune is now available on digital platforms . Regular edition CD jacket First press limited edition CD jacket Time-limited production edition CD jacket ClariS artist illustration RELATED: Regallily Releases Rent-a-Girlfriend Season 4 Anime Ending Song Music Video Following the first season in 2020, the second in 2022, and the third in 2023, the much-awaited fourth season of the TV anime Rent-a-Girlfriend premiered in Japan on July 4, 2025. Crunchyroll has streamed all seasons of the anime for members worldwide excluding China, Japan, and Korea, and describes the story: Kinoshita Kazuya is a 20-year-old failure of a college student. He managed to kiss his girlfriend once, but was dumped after a month. "Ugh… Damn it. I never want to go through that again." Completely spiteful, Kazuya uses a certain method to date a girl. He goes to their meeting place and suddenly hears, "You're Kazuya-kun, right?" A beautiful girl brushing her long, black hair behind her ear was there, smiling at him. Her name was Mizuhara Chizuru. Something real is born after just a single rental! A reckless rom-com filled with love and excitement is about to begin! Source: ClariS official YouTube channel
