Dyson transmigrates into the world of a game he bought but hasn't played yet. Panicking because he doesn't know the plot, he learns that all he has to do to unlock the System is get rejected after confessing to a woman.
To make sure he fails on the first try, he avoids the shallow, looks-obsessed women around him: his family's maid, his childhood friend, and his classmate at the academy. Instead, he chooses the empire's proudest jewel, the eldest princess, as his tool for unlocking the System.
At a royal banquet, before the eyes of countless nobles, he drops to one knee and offers her a blade of foxtail grass. "Your Highness, I don't want to work hard anymore. I'd like to be a prince consort who lives off the royal family and waits to die. Would that be all right?"
The eldest princess: "Sure!"
Dyson: "???"
(Misunderstandings, comedy, love rivals. I'm terrible at writing synopses, so I recommend reading the first five chapters.)