Obliviate

"Remember your first spell you showed us Ron?" questioned Harry
"Shut up" he muttered, his ears turning scarlet
"Oh yes, I remember that" answered Hermione "didn't it go, sun shines, daisies, butter mellow, turn this stupid fat rat yellow-"
"No!" Ron broke in blushing a furious shade of red confirming their suspicions.

This is a Harry Potter fanfic that features many ships and dramas. I do not own these characters, they belong to JK Rowling an amazing author.