The eight-member voice actor unit DIALOGUE+ released their 15th single "Natsu ni Kasanete" ( Layering on summer ) in Japan today, April 22, while simultaneously posting the song's music video on their official YouTube channel . The title track is featured as the opening theme for the summer 2026 TV anime Oh Boy, Was I Wrong About Her . The TV anime adaptation of the romantic comedy light novel series created by Yu Hibari (story) and Shiso (illustrations) premiered in Japan on July 6, 2026 . DIALOGUE+ "Natsu ni Kasanete" Music Video Oh Boy, Was I Wrong About Her Creditless Opening Video The channel is also streaming an audio video for the single's coupling song, "Veranda no Shiori" ( The Bookmark on the Veranda ). "Veranda no Shiori" Audio Video "Natsu ni Kasanete" first press limited edition CD jacket "Natsu ni Kasanete" regular edition CD jacket DIALOGUE+ was formed in June 2019 and have provided theme songs for High School Prodigies Have It Easy Even in Another World (2019), Bottom-tier Character Tomozaki (2020, 2024), My Stepmom's Daughter Is My Ex (2022), Chillin' in Another World with Level 2 Super Cheat Powers (2024), I Want to Escape from Princess Lessons (2025), and other anime series.