hello ^^, here are the links concerning natsume's alice stone
http://www.mangafox.com/manga/gakuen...c072.2/19.html
after the alice stone game, natsume puts the packet next to mikan's window (though that scene isn't shown). the packet contains his alice stone. but natsume wanted to give the stone as her birthday present and didn't do it. ->
http://www.mangafox.com/manga/gakuen...0/c053/34.html
http://www.mangafox.com/manga/gakuen...7/c099/19.html
in that scene, he recognizes the stone at her necklace
