In which Park Chanyeol is a famous YouTuber that goes by the name "The Happy Virus" and Byun Baekhyun is an adult film actor. Park Chanyeol, better known as "The Happy Virus" online was a Youtuber. He made videos on Youtube for a good three years despite his parents' disapproval. What started out as something he tried out and did for fun became more serious as his channel grew and he gained more subscribers. Too quickly in fact; he already had ten million subscribers and the number only grew every single day. He received hundreds of emails from his fans daily. A good amount of them were describing them going through a hard time in school or work, or in life in general, and asking him how he stayed happy and positive all the time. Others talked about how much he inspired them to be positive in life. It warmed his heart to read these messages, yet at the same time, it stung. Because the truth was, Chanyeol wasn't always happy. He was human, after all. But his channel had grown so much in such a short time, he felt obliged to force smiles and pretend to be positive all the time to satisfy the millions of fans he had. He knew how his videos made a lot of people happy, and he felt obligated to continue. He was innocent and naive, and didn't realize that in the long run, forcing sunshine and rainbows all the time was emotionally exhausting. Seeing those emails only made him miserable because he realized how much of a lie his life was. It was too late to change it, too. He had already set the image for himself. Had he stayed true to who he was from the very start, all this wouldn't have happened. Even though he was making a living off of Youtube, his parents weren't supportive of him at all. They still didn't think of it as a "real job" and always wanted Chanyeol to be something like a doctor or an engineer. Chanyeol knew he wasn't smart and couldn't be what his parents wanted him to be. That only added to the stress in his life, knowing how much he disappointed his family. Park Chanyeol, better known as "The Happy Virus" online, in reality wasn't a happy person. In fact, he was anything but.
Byun Baekhyun, seorang mahasiswa tingkat 5 yang tinggal di sebuah apartemen kawasan elit dekat Gangnam. Setiap hari aktivitasnya selain sibuk kuliah, ia juga bekerja paruh waktu di sebuah kafe kecil dekat universitas tempatnya belajar pada hari Senin hingga Kamis dan pada hari-hari lainnya, ia biasa berada di apartemennya menemani seorang anak laki-laki bernama Jackson. Park Jackson adalah anak dari tetangganya, Park Chanyeol, seorang duda yang ditinggal pergi istrinya kabur bersama pria lain yang juga adalah mantan kekasihnya saat sekolah menengah atas. Jackson ditinggal pergi ibunya saat ia masih berumur 3 minggu dan sejak saat itu Park Chanyeol harus merangkap peranannya menjadi ibu serta ayah untuknya. Kehadiran Baekhyun menjadi berkah untuk Chanyeol karena ia dengan senang hati menemani putra semata wayangnya itu saat dirinya harus bekerja. Berawal dari rasa iba, akankah itu menjadi benih cinta?