Not sure how I missed this drama in my youku post but here it is!
Please Feel At Ease Mr. Ling (一不小心捡到爱) is a modern rom-com adapted from the novel written by Chun Feng Yi Du, who you might recognize as the author for novel-to-drama What If You’re My Boss (奈何boss又如何) which recently aired. The story follows our delivery girl – female lead who accidentally knocks over an heir to a large corporation, who at the time was in distress over battling for inheritance rights. He claims to be hurt and requests to be her responsibility. She doesn’t know of his status and thinks he’s not “okay” in the head, so she agrees to house him until he feels better. Thus begins the trope of co-habitation.