It sounds like you're looking for content related to Natsu ga Owaru Made (夏が終わるまで) / Natsu no Owari (夏の終わり) – specifically for a portable animation project or format (e.g., a short loop, a visual novel-style cutscene, a PSP/PS Vita demo, or a mobile-compatible animated short).
The title refers to a multimedia franchise originally developed by the studio Moon Rock. It encompasses a visual novel and a two-episode Original Video Animation (OVA) series. Natsu ga Owaru Made: Translated as "Until Summer Ends." Natsu no Owari: Translated as "The End of Summer." natsu ga owaru made natsu no owari the animation portable
The story centers on the protagonist, Yui, and her boyfriend Kou. They have been in a relationship since their school days and generally have a happy, intimate life. However, the plot takes a dark turn due to the interference of a third party. It sounds like you're looking for content related
Title: Natsu ga Owamu made Natsu no Owari THE ANIMATION Portable The franchise began as a visual novel titled
Which roughly translates to "Until the End of Summer, The Animation Portable: End of Summer".
The franchise began as a visual novel titled Natsu no Owari (The End of Summer), developed by the studio Mink. It quickly gained a following for its evocative atmosphere, focusing on the melancholic beauty of the Japanese countryside and the fleeting nature of summer romances.