>>1952656
Marriage/Engagement was implemented on bombergirl's 6th anniversary.
You need to have a girl rank of 150 with a certain girl and have an engagement ring. The option to enable engagement will appear in the locker room.
>Do you need to buy a ring?
A ring was given away for free at the anniversary event, but you can buy more for 50,000 CP at the CPshop.
>How long does it take to marriage your favorite?
You need 709,250 EXP to go from rank 1 to rank 150. That's approximately 5,000 matches with the girl you want. Arcade has a 150% EXP bonus.
>Can you only have one?
You can engage as many as you want if you are willing to play and get the rings.