Responses
It's alright. When I first read, "Ookami Gui," I thought I found the manga I was looking for too. They have a really similar storyline. However, after noticing the main lead was lewder than I remembered, and there was no sex scene; it was clear, "Ookami Gui," was not the manga I'm looking for. Thank you for trying.
Long story short, A and B are best friends. B is extremely popular. People stalk him all the time. It's A's job to chase the stalkers away. One day, A meets C. A thinks C is stalking B. Somehow C uses B as leverage to threaten A into having sex with him. At first, A didn't feel anything, but mid-way during sex, C confesses his love for A and says he was never stalking B. He was stalking A. A has never been confessed to before and is used to people picking B over him so his heart was touched by C's confession. After that, his mind is drowned with pleasure. In the end they start dating.