The Ultimate Double Standard for the Cool School Belle: Only Be Gentle to Me

[No rebirth] + [No system] + [Youth campus] + [Daily] + [1V1] + [Single female protagonist] "Zhou Jingsi, go to the east gate and pick up a courier for me." "I'm not going! Senior sister, I helped you carry your luggage yesterday and held your seat for you the day before yesterday. Do you really think I'm free labor?" Li Su put down the phone and asked slowly: "Oh? Do you want to charge?" "What about night? Can I also charge at night?" "..." "Forget it," Li Su sighed, "If you don't go, I'll find someone else. The sports students in the next courtyard seem to be quite enthusiastic." "No, senior sister, I was wrong, east gate, right? I'll go right away and promise to deliver the express to you within five minutes." After getting the express delivery, Zhou Jingsi opened it and saw two words on it: ultra-thin Is it the ultra-thin one I thought? Does senior sister want to be with me...