"If You're Twins and You Both Have the Same Face, the Younger Sister Is Better," My Fiancé Said

"Futago de Onaji ga Onara, Imouto no Kata ga Yoi" to, Fiancé wa Itta.
「双子で同じ顔なら、妹の方が良い」と、婚約者は言った。
Oh no! It looks like we have no covers for this series - you can help yourself, us and everyone else by adding some - it's quick and easy!