The System Cried: I Didn't Tell You to Conquer His Sister!

[One-on-one + two female leads + happy ending]

The System orders me to win over a sweet, gentle young master, but I've got my eye on his decisive, ruthless CEO sister. Coming from an ordinary family of teachers, I pretend to be an art-world big shot to fit in with the wealthy, all while dodging System alerts. Who knew the sister would see through my act first, then insist on taking me to an art exhibition? Help! The conquest route has gone completely off course, and even the System is about to cry!