From Attractive Fascinante:

The extension of our cute couple from Room Share, Rio Forest - a foreign college student, and Mutou Keigo – a National Literature college student. This time, Rio was trying to make Keigo understand what his otaku hobby was. Keigo did his best by joining in the same cosplay club and learning to read BL manga and novels. But He still couldn't get it. At this time, another guy showed up and asked Keigo to go out with him. What would Keigo do?