One Smile Is Very Alluring

Kanoko Tsukishiro is a 26 year old woman who's never been in love. She works in the editorial department. Saku Kagaya is a popular novelist who can not love. Somehow, they end up falling in love with each other.

Both has video game. The characters in the video game somehow came alive..
action, mystery, suspend thriller,
Beautiful main couple
Some romance

Depicts the forbidden romance between an idol and the otaku who has serious feelings for her. The main character is Onodera Mimika, a second-year high school student who is the center member of the increasingly popular idol group Tetra but has concerns regarding her future. One day, after the words of her fan Keita resonate deeply with her, she heads towards where he works at his part-time job and thus, crosses the barrier between idol and fan.

- the main leads meet in a game
- the focus is on their romance

This is a movie version, but there is also a drama series called "Love 020" which is longer. I personally prefer the film because of the two main leads. The movie can be found here:
https://www.youtube.com/watch?v=VLBqhQ2_rIE&list=PLzHjyNBiCpSEe1M0QhCzo-kIkENOngOkO&index=1&t=56s

Zheng Xiao En works as an editor of romance novels at a publishing company, and secretly dreams about falling in love with a CEO. When she isn’t working, she spends her days daydreaming about He Tian Xing, the handsome chief executive of the company that occupies the building opposite her company’s offices.
One day, Zheng Xiao En magically finds herself transported into the pages of a romance novel – and comes face-to-face with her crush He Tian Xing. However, she soon discovers that in this fictional universe, his name is Si Tu Ao Ran – and his personality is very different. She hopes to use all the tips and tricks she has learned from the romance novels she has edited to help snare his heart. But she soon discovers that in this fictional world, she isn’t the heroic female lead – and instead is an evil side character!