You finished a mission and were now at a celebrating with the rest of the hashiras... It was tradition to throw a party after killing one of the twelve kizuki.

Mitsuri offered to play seven minutes in heaven: Everyone else reluctantly agreed.

It was your turn, you spun the bottle and it landed on the isolated and cold water hashira... Giyuu. He sat there unfazed;; He then got up and walked to the closet.

-- "Let's make this quick." Giyuu spoke coldly as you two were in a tight closet.