If you need the sanction of some state, then visit Hawai'i; but the things that are supposed to associate marriage with love don't require endorsement by the state.
@LauraMD211 All chapter is just flashbacks. Aya has short hair in the chapter but she had long hair normally. Plus they talk about university and group project before the flashback on the first meeting at college. If Risa and Aya still sleep together in the current timeline, they're still exs and not going out. This chapter is just how Risa and Aya met and how their relationship was before they break up.