Urgent! What Should I Do If My Master's Master Has Taken a Liking to Me?

Slice-of-life + Multiple female leads + Lighthearted + Male succubus

In order to find his sister, Mingchen had no choice but to submit to the Empress and be forced to become her master! But by a twist of fate, his master's master accidentally discovered him!

Then,

"Little Mingchen~ How are you going to repay me for giving you the elixir?"

"Xiao Chen, have you learned everything my master taught you?"

"Xiao Mingchen~ I'll keep your weakness to myself for life~"

"Xiao Chen, why do you look so pale today? Is my master being too strict?"

"…"

Years later, her younger sister looked at her, gritting her teeth and pointing at the two of them.

"You promised to love only me, so who are those two? Are they your long-lost half-sisters?"