So yeah, this is one shot about when apink family meet red velvet family.... So lets go to the character introduction, shall we?

APink Family: 

THE JUNG FAMILY

Name: Jung Eunji

Age: 25 years old

Occupation: A famous vocal coach

Position: Appa

Name: Park Chorong

Age: 27 years old

Occupation: Housewife that run a hapkido and taekwondo centre

Position: Omma

Name: Jung Bomi

Age: 5 years old

Position: Eldest child ( which also the reason why Eunji marry Chorong since she knocked the latter up)

Name: Jung Naeun

Age: 4 years old

Position: Second eldest ( since Eunji cant keep her hands by herself)

Name: Jung Namjoo

Age:3 years old

Position: 3rd eldest (And yes, Namjoo is also accidentally created by Eunji due to her ertness)

Name: Jung Hayoung

Age: 2 years old

Position: maknae ( I think you all know)

Red velvet family:

THE SON FAMILY

Name: Wendy Son Seunghwan

Age: 24 years old

Occupation: Owner of the cafe that Eunji often visited

Position: Appa

Name: Irene Bae Joohyun

Age: 27 years old

Occupation: Housewife and also a famous romance novel author

Position: Omma

Name: Son Seulgi

Age: 4 years old 

Position: Eldest child ( at least she was being created after both Irene and Wendy got married)

Name: Joy Son Sooyoung

Age: 2 years old

Position: Middle child

Name: Son Yerim

Age: 3 months old

Position: Maknae