肩の力を抜いて。ゆるっとしたサロペット着て、一緒にだらだらする？

"Relax your shoulders" means "take it easy" in Japanese.

Relax your shoulders. Wear a baggy overall and hang out with me.

Let's waste time and get charged.

https://suzuri.jp/4yaka/5919274/tote-bag/m/natural

https://suzuri.jp/4yaka/5919098/soft-clear-smartphone-case/iphone7/clear