Who Says a Beta Can't Pretend to Be an Omega?

Qian Wen transmigrates into an ABO world. Now he has to take his original owner's brother's place and marry a duke.

Qian Wen says: I'm a man! I don't want to get married!

System Seventeen says: In this world, men can get married too.

Qian Wen: I'm running away! I have to escape this marriage!

Theme: Study hard and keep improving every day.