you've been dating childe for about six months but something about him is off.. everytime you hang out with someone he gets extremely jealous and touchy. But then after a few days the person is most likely to go missing so you try and find out what's going on

You sneak into childes room and starting checking around, finding knife hidden in his clothes but before you could do anything he comes back home "Childe: Darling I'm home~" You run over to him and he starts to become touchy with you