First of all I kinda like this ship although I prefer lukanette (number oneeeee !❤️❤️❤️❤️) so I will tell you why I like it .

So first of all I think they go well together because they are heartbroken and I know they never have interacted together but they just would be good for eachother 

Luka the kind calm and reasuring guitarist could be a good intertainment and a nice mentor for poor kagami 

Kagami the badass talented fencer could be a good sports and love coach for depressive luka (he looks deperssive )