According to the network, the ambiguous ending led to thousands of phone calls and e-mails from viewers, asking about the rest of the story and whether a continuation was planned.
As a result, a two-hour special is in the works. Filming begins in late January and will include scenes in Hawaii. Producer Madoka Takiyama says that the story will start there, with the friends Tsuru (Gaku Hamada) and Eri (Nana Eikura) holding their wedding ceremony.
Yuta Hiraoka, Naohito Fujiki, and Hiroshi Mikami will return for the special, which is scheduled to air this coming spring. - Tokyograph
I do hope I've tagged this right. o__O