The uke have romantic feelings for the seme, but the seme wants to keep as partners in a sex contract? So uke needs some time to sort out his feelings, then the seme seems to be falling for the uke as well. Then last chap we see the uke's ex sex friend/boyfriend?
This was so cute (≧∀≦) the way he kissed him when he was looking sad was too adorable, I'm sad it's finished tho ( ・﹏・)