Do you like an otaku girlfriend? Obviously the answer is NO, But.....

She was come to school only 3 days a week, has sickly body, smart, super popular, and cool beauty "mysterious heroine" Shiraishi Yuki.

And an "ordinary protagonist" Sakai Haruhiko who nothing stands out and a harmless guy who does not seems like protagonist at all.

The heroine that the protagonist fell in love without knowing anything ... actually a super closet hikkikomori otaku!!

Thus, this is my story to understanding her hobbies, walking in thorny otaku path.