ClariS and Fushimi Tsukasa


Watching Ero-manga Sensei's song (forgot if it was the opening or the ending),
I immediately noticed that it was sung by ClariS. Now, interestingly, both
Ero-manga Sensei and Ore no Imouto ga Konnani Kawaii Wake ga Nai are written
by Fushimi Tsukasa. Both also has their theme song sung by ClariS.

Is this just a coincidence, or there's more than meets the eyes?

