Itsuwari no Akujo desu ga Suenagaku Shiawase ni Narimashou: Onozomi no "Koiooki Onna" wo Enjiteiru no ni Otto no Yousu ga Okashii

Lynette, in place of her sister, is to marry Alfred, a rumored playboy who wants a young lady who can "wrap men around her fingers". In order to avoid being kicked out, she tries to act like the villainess Alfred wants, but his reaction isn't so good!?

On the other hand, Alfred isn't actually a playboy either, but a very pure and innocent novice in love matters. But he decides to pretend to be a playboy in order to find out the intentions of Lynette, who was sent by the rival queen, are!?

(Source: Palcy, translated)