Why a fanlisting about Matsumoto Jun & Inoue Mao?

Matsumoto Jun & Inoue Mao are both co-stars in Hana Yori Dango, a popular Japanese TV serial based on the Japanese shoujo manga by Kamio Yoko (also called Hana Yori Dango). Matsumoto Jun plays Doumyouji Tsukasa, an arrogant, violent and spoiled brat. However, he is very tender and caring with the girl he has fallen in love with. Inoue Mao plays Makino Tsukushi, a very poor girl who is determined and strong.

As time goes by, we can see through Hana Yori Dango Interview, Special and "Behind the Scenes" that Matsumoto Jun & Inoue Mao are being closer to each other. Matsumoto Jun, who used to be distant and cold towards his co-stars, seems to be different with Inoue Mao. In every picture or video, there is a glow in both of their eyes that shows their special closeness. Is there any chance of an off-screen love relationship?