If you were actually looking for a coming-of-age anime with a similar "summer" theme, you might enjoy series like Ano Natsu de Matteru (Waiting in the Summer) or the psychological mystery The Summer Hikaru Died .
Mei appears to be the token love interest, but she subverts expectations. In Cap 2, she confesses to Haruki, but when he hesitates, she says, "That’s okay. You’re in love with the summer, not me." She becomes an unexpected ally rather than a rival.
The second episode focuses on Kaito's interactions with a mysterious woman named Aya, who has a significant impact on his life. The pacing is well-balanced, allowing the audience to absorb the emotional depth of Kaito's experiences.
"Shounen ga Otona ni Natta Natsu" is a captivating manga series that has quickly gained a loyal following worldwide. The first three chapters provide a compelling introduction to the story, characters, and themes, setting the stage for a poignant and thought-provoking exploration of adolescence and growing up. If you're a fan of coming-of-age stories, character-driven drama, or simply great storytelling, this series is definitely worth checking out.
Manga (first serialized in adult magazines like Comic MILF around 2022–2023).
For those interested in reading the manga, various online platforms offer "Shounen ga Otona ni Natta Natsu" with English subtitles, including:
: If it's a manga or light novel, platforms like Comixology, Crunchyroll Manga, and others might have it.