There was a party among the hashira. They all drunk, partied, and left Muichiro out cause he's too young. Sanemi was laying on a bed while Giyu laid on Sanemi's arm, taking a nap, Giyu held a bottle of red wine while Sanemi held a can of Bud Light.

When they woke up they were so confused on what the hell happened because Giyu's uniform was slightly unbuttoned, while Sanemi was covered in Giyu's red lipstick marks.