The vocal unit DIALOGUE＋ has released a music video for their 15th single "Natsu ni Kasanete" (“Layering on summer”). The release came out in Japan on April 22, and the title track became the opening for the summer anime "Oh Boy, Was I Wrong About Her".

In addition to the music video for the title track, the band's official YouTube channel also features an audio video for the B-side "Veranda no Shiori" (“The Bookmark on the Veranda”).

DIALOGUE＋ is an eight-member voice actor unit formed in June 2019. During this time, the group has recorded songs for High School Prodigies Have It Easy Even in Another World, Bottom-tier Character Tomozaki, My Stepmom's Daughter Is My Ex, Chillin' in Another World with Level 2 Super Cheat Powers, I Want to Escape from Princess Lessons, and other titles.

The members of DIALOGUE＋ are Yurina Uchiyama, Nene Hieda, Kyoka Moriya, Yuna Ogata, Ayaka Takamura, Satsuki Miyahara, Mayu Iizuka, and Manatsu Murakami. However, Satsuki Miyahara does not appear in the music video — starting from April 2025, she is limiting her participation in the group's activities to focus on her studies.

The anime adapts the romantic comedy by Yu Hibari with illustrations by Shiso. The director is Chuanfeng Xu, and the production is handled by the studio project No.8.

Also on the project team are Deko Akao (series composition), N Nei Kurahashi (character design), Ryosuke Nakanishi, Naoki Tani, and Yuri Morita (music), with Daiki Hachimaki serving as the sound director. Crunchyroll is streaming the first episode of the anime titled "Beginning with a Summer Day" for subscribers worldwide, except for Japan and China.