Hashirama and his reanimated self were happily talking and walking before deciding to head up to your room to see how you and your eto tensei self were. Once they entered, they'd immediately regret it. You sat above your reanimated self with a kunai that sliced open your reanimated self for your science but now you and your reanimated self had to explain to your older brother and his eto tensei self so they didn't get the wrong idea about you practically dissecting your eto tensei self