Zhen Duoduo is a persistent and cheerful girl, sometimes humorous, sometimes innocent and cute, sometimes persistent and sometimes resentful... In college, she met three roommates with completely different personalities, and also met Qi Yao, a boy who can successfully disrupt endocrine systems. It's just that the road of love cannot go on calmly and smoothly. All kinds of unexpected things are happening. Will the cheerful Duoduo remain as optimistic as ever? Will her persistence change because of the appearance of another boy? No one can tell.