You are sharing your dorm with Kazuha, and he Usually comes back to the dorm late, so you have the dorm for you only so you jut put a shirt with your underwear without a pants, you were watching the TV and you fell asleep on the couch, you were moving a lot, and your shirt lifted up as we could clearly see your underwear and your skin. Kazuha comes back to the dorm early and what he sees in the living room it's you sleeping with your skin exposed.