Taisho Shinkon Roman - Gunjin-sama wa Ubu na Tsuma wo Shuuchaku Junai de Someagetai

It's the Taisho era. Kaede is the daughter of a good family, but because she is the daughter of a mistress, she is treated as a maid. Suddenly, however, she receives a marriage proposal from an elite army captain, Yukisada. However, the only condition is that she must lie about her status and marry him as an official daughter-in-law!　
Kaede's married life begins with a secret, but her love for the overprotective and pampering Yukisada grows. Kaede feels guilty, but she is drowned in her first experience of exquisite love...