After dying of an illness, the female lead, Yi Yueyue, binds to the Little Mistress Conquest System and transmigrates to various worlds, where she tests whether the love between each original world's male and female leads is truly unwavering.
1. The younger sister of the female lead in a "sweet campus romance"
2. The campus belle's roommate
3. The biological younger sister of a fake heiress
4. A little beggar who was helped by a vicious supporting female character
