The one word that can be an antonym of both is accidental.
irony
well what do you expect. "For every action, there is an equal or opposite reaction." There is subtraction, and the opposite is addition.
The opposite of "expected" would be "unexpected" or related words such as surprising, unanticipated, or unforeseen.
Irony
The opposite could be quiet (speaking little) or laconic (using few words).
My dog can meow and my cat can woof, exactly the opposite of what you'd expect to hear from these animals.
Irony is when the opposite of what you would expect to happen actually happens. A firehouse burning down to the ground is ironic because you would never expect that to happen.
Depending of what type of boy he is he might go quiet and try to avoid you or he might do the opposite and ask you out!
A tendency to stress the negative or unfavorable or to take the gloomiest possible
The sharp side is opposite where you would normally expect it, while the normal cutting side, is the wide unsharpened portion of the blade.
That is one of the mysteries of life. Women are complex creatures. Cant live with em cant live without em.
If you are the opposite gender from the gay person, then move on. You cannot pursue a relationship or expect anything from the other person, beyond friendship.