A Japanese girl, by the name of Mizuki Ritsuko, had come to Korea to visit her cousin that had been working with YG’s BIG BANG, since they made their first debut.  Her cousin has been friends with BIG BANG since he started college and is grateful that Mizuki is coming to visit the band once again. Seungri, the maknae of BIG BANG, had many experiences with Mizuki and couldn’t take his mind off of his dongsaeng coming to visit once again. Seungri was happy until Mizuki's cousin revealed the news about Mizuki's long term amnesia a year ago. With Mizuki's lost memories, Seungri and his hyungs must act like they haven't met her.  Can Seungri, her cousin, and the rest of BIG BANG restore their dongsaeng’s memories before it’s too late to even retrieve it? 

Characters

Ritsuko Mizuki (Mizu)

• 19 years old
• secretly a fan of bigbang
• stubborn but kind
• hates playboys

Seungri

• 19 years old
• the maknae of the group
• stubborn and arrogant
• playboy

Daesung

• 20 years old
• vocalist of the group
• the smiling angel
• kind and honest 

Ritsuko Rikuto (Riku)

• 19 years old
• twin brother of Ritsuko
• overprotect

Yamamoto Hiro

• 23 years old
• cousin of Mizu and Riku
• works for YG