I read this manga earlier, but i can't remember the title. I know it is yaoi with either no or very few explicit scenes. It's about an orphan who one day meets a man who tells him that he is a prince. His kingdom sent the guy to bring him back. However, the kingdom is poor, and could only afford to send that one dude. Also there is a weird crossdressing?? assassin after them.

Thank you for your help!

Hashire! Ouji-sama by Yamakami Riyu, perhaps?

Yes!
Thank you so much. 😀