reluctantly
In a slow, unwilling way, because you don’t want to.
Reluctantly means doing something you don't want to do, even though you're doing it anyway. When you act reluctantly, you might drag your feet, sigh heavily, or take your time getting started, because part of you wishes you didn't have to do it at all.
Maybe your mom asks you to clean your room on a sunny Saturday when you'd rather be outside playing. You eventually start picking up your toys, but reluctantly: you move slowly, you grumble a bit, and your whole attitude shows you'd prefer to be anywhere else. Or perhaps your teacher asks for volunteers to present first, and you raise your hand reluctantly because no one else will, your arm rising slowly as if it weighs a hundred pounds.
When you do something reluctantly, you're doing it, but you're also kind of struggling against it in your mind. You might reluctantly admit you were wrong, reluctantly share your favorite snack, or reluctantly agree to try a food you think you won't like. The key is that you're moving forward despite your resistance, not enthusiastically or eagerly.