Searching for the manga

Sooo I once read a couple of chapters of this manga, but I forgot the name, but the story goes like this:

There is this girl working at an office, her mother keeps telling her to marry, but she doesn’t want to. So she found her self a person to pretend to be her boyfriend so that her mom would stop force her to marry.
She asked an college? at work to be her ‘temporary boyfriend’
He has glasses on, and is quite/not interested in others, lived with his dad and stepmother, but left the house later cause he had something with her
He probably has a child with his stepmother, that child always visits the house of the man, but doesn’t know that he may be his father.
The girl (main character) has a kind o disease, she takes allot of medication. (I think she has hivv? Because her childhood friend raped her?

Whats this manga called? Does anybody know the manga