Congrats Ayu! I wanna see the ring now! Lol.
From reading the comments I'm sad to see everyone being so negative.
Yes, he and Ayu have quite the age difference but age shouldn't matter if they are in love. Age is just a number. (I know from experience I'm 24 and my boyfriend is 36 and we are very happy.)
This guy is going to be a doctor so I doubt he's a total freeloader. He has to have some kind of money to be putting himself thru med school. (And to be dating Ayu knowing her expensive taste. xD)