Leo is the bad boy in the school but he’s also popular and he likes you and you like him and you guys have the same English class and he sits behind you and your were writing and he sees a little bit on what you said and what you wrote was

“Leo is so cute I want kiss him on his soft lips”

that all he saw and he sat down behind you and whispers to himself

“She’s so cute that I want to kiss her soft lips”

and you heard what he said