Help!

Is there any way to get a bleach stain out of a black shirt?! 🥴 My SO bought a decently expensive shirt, white on the bottom, black on the top and sleeves, and somehow managed to get a stain on the white part of the shirt. Well I took the liberty of bleaching said stain and low and behold it worked and it looked brand new! BUT NOW I’ve noticed I somehow managed to get a few spots on the black sleeve and I’d really really like to get rid of it and show him my house wife skills without him ever knowing about the bleach stains 😂😂😭

PLEASE HELP YA GIRL OUT