ok, most people don't see this right away, but thanks to YouTube shorts spamming these "skinny shaming and fat shaming is bad" shit with all these middle schoolers in my recommended section, to me the top photo is you with the back of your shirt being tied so your body looks slim, meanwhile in the bottom photo you undid that knot making the shirt baggy again, so to sum it all up in one scentence:
you look like you gained weight in the bottom photo