Sho is kind and considerate, he's used to girls clothes because of his sister, as long as it's not underwear it should be fine. Mirei doesn't remember as much about Sho as he remembers about her, even though he was distracted by another girl, Mirei was attached to Sho at a very young age, she got jealous when he got with a girl that was around him more than she was, she started pouting and stayed away from Sho during summer visits.

あーこれは脱いだ下着をスマホで撮って夜中の自家発電ですね、、、
16歳では当たり前ですね

さっきまで、「握手会で推しアイドルに告白した次の日から隣の席に座る目隠れ女子の様子がおかしいんだけど？」を呼んでたので、「鈍感系じゃない！？」ってなりましたw