Natsu ni Tokeru Himitsu no Koi by Fukami Hisato

Summary

Plot: Natsugami keeps remembering the beautiful boy named Aki that he once met in an abandoned building, due to trauma after seeing him being violated by someone in that place. His junior, Miyoshi, confessed to him but he couldn’t embark on another journey of feelings because of these memories. In order to face Miyoshi’s feelings and his past to unravel more details of Aki, he went back to that abandoned place, with Miyoshi tailing him.