
When Izumi said: 'I was calm and happy when I was in love with the professor, because I knew nothing would ever change, for the better or the worse' I really felt that. When I was in love with a girl in high school I felt exactly the same... I knew she was straight and that I had no chance so I didn't confess during that time because simply loving without consequences was good enough for me... It's interesting to see it being put in words.

I think this is the story so far: (I had to read the first chapters like 4 times to make some sense of it).
Real prince Daniel helps isekaied boy Rael and since they look the same, they share Daniels duties and switch places between a mercenary guild or something and the palace. Another prince (emperor) visits their kingdom, falls in love with Rael on the spot. He spends the next months with Daniel after Rael got enough of it. Then new prince (emperor) has to leave, and being in love; he requests to be allowed to fuck the prince for one night and promises good trade relations as an award. Daniel panics and Rael offers to take his place. Rael is okay with whoring himself out because Daniel saved him. Rael and other prince (emperor) fuck for three days. Prince (emperor) leaves and something happens one year later...
Did I understand everything correctly?
That's the end? Dooyoung's story ended just like that?