I got so emotional the first time I watched walk ~to the future~ haha. The dog scene is soooo precious, I can't watch that and not remember the pictures of Kumi and Misono playing with the dog when they were kids.
I also love Ai wo Tomenaide. I like how mature the song and PV are. In comparison to the over dramatic Suki de, Suki de, Suki de, it really felt like a step up in the mature side. That swing bench scene from Suki de, always gets me, the way that she goes to the floor crying lol.
Both singles are very good tho.