ひ、紐パンだと…なんてこった……きっちりしてる真昼ちゃんのことだ確実にブラジャーとパンツはセットものだ。

She wears s-side-tie panties... hot damn...... In the case of the always proper Mahiru-chan, it's obviously certain she wears a matching bra and panty set.