"It's their fault. Not ours."

Apink and BtoB are the youngest groups in Cube. But who knew that the 2 groups have developed a 'Hatred' and habit to squabble and ague with each other? Their sunbaenims,4minute, BEAST, G.Na, Noh Jihoon, don't understand why they have something to quarrel about the moment they see each other. And when their sunbaenims ask why they are quarreling, they come up with a bunch of excuses. Apink and BtoB would have long ago killed each other but only because of their siblings. But what's the real reason the quarrel among themselves? Do they really hate them in actual fact?

Characters.
Main characters
 

Park Chorong( A PInk.)

Main rival: MInhyuk
91 Liner.
Chorong is the doe-eyed, responsible leader of Apink. However, at times she can seem a little immature with a squabbles with MInhyuk.

Yoon Bomi(A Pink.)

Main Rival: Eunkwang.
93 Liner.
Bomi is the pretty sister of Yoon Doojoon and the main dancer of A Pink.Many don't understand why she and Eunkwang hate each other.

Jung Eunji(A Pink.)

Main rival: Changsub
93 Liner (Younger Bomi)
Eunji is the pretty main vocalist and the 'bangs' girls of A Pink. She is Ilhoon's older sister and her rival is Changsub.

Son NaEun(A Pink.)

Main Rival: Hyunsik.
94 Liner.
Naeun is pretty visual and lead dancer of Apink. Her cousin is Son Dongwoon of Beast her rival is Hyunsik.

Hong Yookyung(Apink.)

Main Rival: Peniel
94 Liner( Younger than Naeun)
Yookyung is the pretty,best english speaker and lead dancer and rapper of Apink. She and Peniel can never see eye to eye with each other.

Kim Namjoo(Apink)

Main rival: Sungjae
95 Liner.
She's the bubbly,lively and pretty lead vocalist of Apink. She and Sungjae are the only ones who is the same age as their rivals.

Oh Hayoung( A Pink.)

Main Rival: Ilhoon.
96 Liner.
Hayoung is the Kara's Gyuri look-alike maknae of Apink. She and Ilhoon were the last to have rivalry among BtoB and Apink.

Lee Minhyuk( BtoB)

Main rival: Chorong
90 Liner( Younger than Eunkwang by a few days.)
MInhyuk is the handsome visual and lead rapper of BTOB. He and Chorong has the most squabbles among them.

Seo Eunkwang(BToB)

Main Rival: Bomi.
90 Liner( Older than Minhyuk)
Eunkwang is the Main vocalist and the charming Leader of BtoB. He and Bomi, like Minhyuk and Chorong, can stir up a big squabble among each other.

Lee Changsub

Main Rival: Eunji
91 Liner
Changsub is the Shindong look-alike lead vocalist of the group. He and Eunji just can't comply with each other.

Lim Hyunsik( BtoB)

Main rival: Naeun
92 Liner
He is the dashing lead vocalist of Btob and the handsome rival of Son Dongwoon's cousin.

Peniel Shin(BtoB)

Main Rival: Yookyung
93 liner
Peniel is the handsome english rapper of BtoB and is Yoojyung's rival

Jung Ilhoon (BtoB)

Main Rival: Hayoung
94 Liner
Ilhoon is the baby-face main rapper of BtoB he and Apink's maknaes are known as the late rivals. Eunji's younger brother

Yuk Sungjae( BTOB)

Main Rival: NamJoo
95 Liner (just like Apink's Namjoo)
He is the all-rounder maknae of BtoB. Rivals with Namjoo.

Supporting Characters:

4MINUTE

From left to right: Sohyun, Hyuna, Jihyun, Gayoon, Jiyoon.
Apink and BtoB's sunbaenims
Dating Beast:
Sohyun-Dongwoon
Hyuna: Junhyung
Jihyun:Doojoon
Gayoon:Yoseob
Jiyoon: Kikwang

Beast:

From Left to Right: Dongwoon, Kikwang, Hyunseung, Yoseob, Doojoon, Junhyung
Dating the 4MINUTE girls except Hyunseung who is dating G.Na
Apink and Btob's sunbaenim

G.Na

Solo Singer.
dating BEAST's Hyunseung

Noh Jihoon.

Solo singer.
Dating Ailee.