I dont remeber the episode number, but tadase needed to do some shopping for guardian supplies and everyone was busy so he and Amu went alone. (No not the aquariam episode) Karrii was spying on them the whole time, trying to figure stuff out about Amu.
Tadase gets icecream for him and Amu and amu gets some on her skirt(stupid gurl) and Tadase gives Amu the icecreams and runs off to get some napkins. Amu sits on a bench and turns to see that Ikuto is magicaly sitting there. Amu jumps up and trips on one of the shopping bags she has and falls in Ikutos lap. Then ironicly Tadase come running up and is like "Ikuto, what are you doing!" and he gos "I came to hold her." then the icecream starts to drip and Amu sticks her tongue out to get it and Ikuto lick sthe icecream at the same time.
Pant, pant, pant.. Sigh, thats what basically happens on the episode. Ikuto and Tadase start fighting, but they run off so you cant see them. I need to figure out that episode number for you. Its a good one, one of my favorites.