hello! So there's this yaoi manga that I'm looking for, i'm pretty sure that it was by Cj ...

hello! So there's this yaoi manga that I'm looking for, i'm pretty sure that it was by Cj Michalski, and it's about some dude that has an arranged marriage but he already loves someone girl, so they organize a plan to run away with each other, and the girl has a younger brother who the main seme mistakes for the sister and kidnaps him and keeps him locked up in a fancy looking apartment, and then the runaway couple comes back to rescue the little brother but the main seme wouldn't allow it because he ended up falling in love with the little brother. Thanks for the help!
ヾ(❀╹◡╹)ﾉ~