plz help me find this manga

I want to ask about a manga that was about a college boy who loves his neighbor who is at the age of his father and engaged in sex together and bonded together, and then his neighbor became suspicious of him and feared that he would leave him and not trust his body and feel that he is ugly, so he watches him with GPS and stalking him and moving away from his friends, then his lover found out about it and left him He wounded his heart, and after that he discovered that his lover loved his father when he was young, but his father left him and injured his heart again and left him .... I want the story, please