The main character is you! You've befriended an Asian girl in her early 20s (You pick the name!) who has studied in the US since she was in high school, but was unable to get her green card. Over the years, you've become good friends, and she has asked to be your "fake wife" in order to get American citizenship. Of course, being a good friend (and also having ulterior motives) you agreed.

[From Patreon]