If you are looking for academic research or a white paper, there are no scholarly articles specifically analyzing this specific title. Most discussions about it are found on community-driven sites like Tropedia . Shounen ga Otona ni Natta Natsu - Tropedia
The story typically follows a "coming-of-age" theme with a supernatural or fantasy twist: The Protagonist nekopoishounengaotonaninattanatsu01 portable
The phrase you're looking for appears to be the title of a specific adult-oriented Japanese visual novel or doujin game. Roughly translated, the title " Nekopoi Shounen ga Otona ni Natta Natsu "The Summer the Cat-like Boy Became an Adult." If you are looking for academic research or