From MangaHelpers:
Nagisa is excited about her first boyfriend ever, Chihiro, whom she met in college. He is cool, good looking, and everything she hoped for, except for one thing: he is an otaku. You wouldn’t be able to tell by just looking at Chihiro, as he doesn’t fit the stereotype, but don’t be fooled by his appearance--he is just as hardcore as the others. But Nagisa is so in love with him that she accepts him as a whole, good and bad. She tries to understand what he likes so that they can grow closer. Little by little, Nagisa starts to change.