Ore wa Kanojo o Shinjiteru!

Original · 俺は彼女を信じてる！ 上巻「セカンドヴァージン」

Ayumu and Kensuke are two friends who were close friends in their childhood. As adults, they are working for a company that creates PC software. These colleagues were able to hide their passion for each other so far, but today everything seems to change! They end up together and they are fucking like a pair of rabbits.