The World Only God KnowsI was watching this series the other day, and episode four just screamed to me "Minori game spoof!" What especially gave it away was the music.
Check out the ED for Episode 4: http://www.youtube.com/watch?v=DuBYgI5lnvA
That really nailed it as a Tenmon-style pop song to me. And guess what? Anime News Network actually credits Tenmon with composing and arranging. No wonder it sounds like his style: he created it... lol
Compare to the several game OP he's done with Shinkai, included on this page.