The 2nd costume of Nijisanji KR's Nun Bora, released on Valentine's Day 2021, as seen in post #4364065. It is arguably her most recognizable appearance, as it was used as her primary outfit after it was unveiled.
In this outfit she usually wears her hair short with a yellowribbon and hairband. This look also revealed that she has medium breasts under the thick winterwear of her original outfit.