Bell and Aiz take on a quest that requires them to get publicly married. Aiz hears they will receive two tickets to a private restaurant where they will be served free Jagamaru as a quest reward. Aiz: Let's do this quest Bell. Bell: Are you sure Aiz? Aiz: Yes. Bell: Ok then.
Later that night:
Bell Cranel is having dinner at the hostess of fertility. The Loki familia arrives. About 10 minutes pass. After a drink Bell works up the courage to ask Aiz to marry him. As he's about to stand up a slightly intoxicated Aiz walks over to Bell. She kneels and holds Bell's hand then proposes. Aiz: Bell Cranel, will you marry me? Bell: I'm pretty sure that the man is supposed to propose but yes i'll marry you Aiz. Everyone else in the tavern is shell-shocked. The eternal breaker of 1000 hearts just got engaged and she was the one that confessed. Loki and Hestia familia are speechless as well. Loki then says "I will never approve of this." Aiz: Then I will leave the Loki familia and join the Hestia familia.
Loki: You're joking right? Aiz: I'm serious. Loki: Why? Aiz(slightly whispers): Because he reminds me of my father.