I dont understand it very well but its something like this
Giotto: Decimo, go give that mare kid a scare. Tsuna Giotto: fuuuu~ Tsuna: Primo? Giotto: I can't leave my descendant in such a dangerous place I just can't! Giotto: Oji-chan will fight too! Tsuna: P-primo calm down!
>/////< I love 1st gen/10th gen family fluff!!! But i hate yaoi of anything in anime D: blehhh (real life is ok though)
Oji-chan means grandpa BTW and she/he didnt draw this its a pic from pixiv.net.