Nyotaika Shite Idol ni Naru | Turn into a girl and become an idol (Nyotaika Shite Gokujou no Kanojo ni Naru)
(C90) Kawaii Otouto wa Onii-chan no Tame ni Imouto ni Narubeki! | The Cute Otouto Has to Become an Imouto for the Sake of his Onii-chan!