/Ayato x Aether/ Contract marriage + ABO AU (Patreon)

Hello, this is the opening drawing of my NSFW series this month, the theme is ABO and contract marriage (?).

Aether and Ayato were engaged since they were young, however they didn't see each other much and had to separate to study and develop themselves before marriage. When they meet again 16 years later, how will they face each other? (I mean how will they fuck each other because the content I draw will be all fucking hahaha).

 I'm not very good at English, is there any word in English that means marriage between 2 rich families to increase prosperity and power? If you know, please teach me.

See you soon with this month's drawings~