In her twenties, she was emotionally blank and still believed that she would meet the right person. She believed that whatever was left over would be the best. This theory is despised by her roommates, but she is a cheerful silly girl.
He came back from a foreign country, met her in the library, and then had an "encounter" that he knew well every week. He understood, and secretly laughed at her clumsy concealment.
She slowly warmed her heart and warmed him as well. She wanted to give him the best things and tell him that she loved him...