Dating sims. Thats all that Joonmyun did on the computer (other than work that is). 

His life was ideal in his eyes. His day basically consisted of, waking up at 10am, drinking some coffee, eating and using his computer.

Joonmyun was a regular guy; he lived alone in an apartment in Seoul. He worked a stay at home job so he was pretty much glued to the computer every hour of the day, which got him into dating sims.

 He never really thought he was the type of guy to play dating sims even though his friends would play them non-stop, but what else can he do when he has to sit at home and type away endlessly.

At first he only played simple dating sims with a script that could have been written by a twelve year old which gradually gotten to tear jerking, sweet story lines to heart wrenchingly sad character backstories. Either way Joonmyun had an obsession.