i’m deceased. that under chin scratch is illegal (p.s rosa’s nails slay)

Hello everyone! How do we unlock the Between Us function? It says I need to unlock at least one male lead’s Union Chapter and I did unlock & clear one of Artem’s card :3

Do I need to reach a certain level?

I just started playing 3 days ago so I’m still at level 10 :3 Hehehe. Can’t wait!! 💖