Need help finding this yaoi.. I'm not sure if I've got everything down but here goes... so...

Need help finding this yaoi.. I'm not sure if I've got everything down but here goes... so its about this guy who has a twin sister, who is then getting married to some ceo guy (i think... idk) and they end up eloping coz the ceo guy's bro is against it or something. Then bro ends up locking the guy twin away in a hotel thinking he's the girl twin but then sleeps with him while he's locked in the hotel room. Then they end up falling in love with each other anyway and bro gives his blessings to the ceo guy and girl twin and lets them get married.

Ahhh i hope somone knows it coz I've been looking for it for aaaaaages and i just cant find it!