^^^^ I mean that basically what the hang out events are, at least some of them. Noelle's is pretty overtly romantic, and some of her lines about attracting people change depending on if you play as Lumine or Aether.
The three of them are so sweet together. I like to imagine Shining and Nightingale went with Neal in the Kazimierz Major event so that Nearl could introduce her girlfriends to her family.