Can anybody help me find this manwha? This is what I remember the main character is a girl...

Can anybody help me find this manwha? This is what I remember the main character is a girl with brown hair and I think green eyes, who gets reincarnated into a novel. The novel she got transported into is about a guy who also got transported into a novel and bulit his own harem there. The Main character decides to be try and be apart of the harem in order to make money, and takes the characteristics of the sweet and innocent type,and gains his trust immediately. She later gains the ability to read his thoughts thanks to the system. The og main character has a sister and is a jerk who constantly uses the mc the Og mcs harem all get attached to her and defend her. The OG OG main character is nice and I think had blue hair and used a sword. There was this one scene where the og main character wanted to make a club but would only let pretty girls in. Thats all I remember.