Oh No! The Romance System Lied and Told Me It Was a Reading System!

A “damned” romance System disguised itself as a study System and came looking for her! [Quick transmigration / Sweet romance / Lighthearted comedy / 1v1 / Has a real-world storyline] Worlds: 1. Win over an innocent, sharp-tongued high school boy 2. Win over a poisonous-tongued but insecure CEO 3. Win over a gentle but gloomy rich-family older brother 4. How did the cool, aloof senior sister I'm supposed to win over turn into a senior brother? 5. Win over the mecha belonging to the male lead of an interstellar novel. But the mecha has no feelings, so she can only build her own System, which ends up winning her over instead