Are oh my girl scared to comeback because

or maybe they're preparing quality music???

Stop overthinking unless you are trolling

"Scared to come back"? Comebacks depend on company, not group. So no. They aren't scared to come back.

So they will never comeback then?

they will be considered as two hit wonder I guess!

For an almost 6 year old girl group they have nothing to lose anymore. They have decent success before they have a NS/Dolphin and at this rate they might just go back to SSFWL/SG level which is still fairly good. Plus members are still having their individual activities is already a win for them.