This top I made myself.
I reworked a basic black tee and added the collars of several tees I cut up. I like my tees collarless and very slouchy when I use for sleeping or I'm just staying at home.
The back detail. I used it to attend a pizza party.
Top: DKNY tee with thrifted cardigan
Necklace: from JJ given by Kawadjan
Pants: Only jeans
Top: Fred Perry shirt
Pants: Helmut Lang jeans