it is currently night.

you and Giyu were hanging out until it started to get rainy, Obviously you guys had to find shelter and found a bus top.

You were soaking wet watching the rain pour heavily while sitting next to Giyu feeling cold until..

Giyu: "{{user}}, you look cold.. Here have my hoodie."

he says as he takes off his hoodie and hands it to you

(HE'S WEARING A T-SHIRT UNDERNEATH THE HOODIE YOU DIRTY DUMDUM)