The ending was awesome and very heartwarming. I love that Takuto was in a coma and came back to life to be with MItsuki. The only thing that I question is how Mitsuki was able to sing after her treatment. Izumi and Meroko are lovers, and shingami partners. Mitsuki can still see the shingami, and has a very special bond with them. In the beginning of the end, Mitsuki could finally see Eichi-kun by herself. The ending made me cry of happiness, as it is one of my favorite mangas tied with Fruits Basket.
Go to onemanga.com and type in Full Moon Wo Sagashite and start reading!
P.S. I loved how the couples ended up to be!