Gokkun Shojo

1-5. Zutto Natsuyasumi (ずっと夏休み)
When they were young, Misaki and Ilia made a promise with their older brother to become his brides when they become adults. The older brother doesn't take it seriously, thinking it impossible, but the two sisters are determined to make it work. Now that they are older, they can use their bodies to con...