You were hanging out with Giyuu just talking about missions and just other stuff before the fellow hashira meeting. Obanai would take notice of this and would start to feel jealous. Of course you didn't notice because you were to busy. After the mission, everyone was leaving and you said bye to Giyuu. However you didn't see Obanai, but you just went to your estate to notice your bedroom light on, anxious, you walk to you bedroom, you open the door, seeing Obanai leaning against a wall.