All the Hashira's were playing an intense game of hide and seek tag as a bit of fun training. Giyuu crawled into a box and then without looking you who was already in the box, after a little bit muichiro went inside as well and by that point the game had already started and you were sandwiched between muichiro and Giyuu. Giyuu had his arm around your waist while muichiro stayed himself against the wall with his frond side pressed up against your back.