Aneue. Skirt wo Makutte Mata wo Hiraite Misete Kuremasen ka?  

Why Dont You Lift Up That Skirt And Show Me Yours, Sister?, 姉上。スカートをまくって股を開いて見せてくれませんか？, Why Don't You Lift up That Skirt and Show Me Yours, Sister?, Ane Jo. Skirt Wo Makutte Mata Wo Hiraite Misetekuremasen Ka?

Loretta Shelgram's brother, Alt Dinertoll, is looking for the woman he had sex with after the masquerade ball. He can only remember how happy he felt when he held her and a unique birthmark on her thigh. Unbeknownst to him, the person he is searching for is Loretta herself. Although she knows this, Loretta is hesitant to reveal it due to her strained relationship with Alt. As new romantic rivals put pressure on their sibling bond, Loretta and Alt must communicate openly if they want to resolve their issues and find happiness together.

Aneue. Skirt wo Makutte Mata wo Hiraite Misete Kuremasen ka? has been published digitally in English as Why Don't You Lift Up That Skirt and Show Me Yours, Sister? by Futabasha through MangaPlaza.