Love Yourself

Based if Mei-chan no shitsuji. Kazuya Kamenashi's family has always been butlers for a very important American man, Edward Prince, who has his hands in everything everywhere. But as you already know Kazuya chose a path of music being a member of Kat-Tun. When Edward finds his long lost granddaughter, he finds out she loves Kat-Tun and forces Kazuya to join the butler school to be the butler of his granddaughter.