My Dress-Up Darling Vol. 6

In Vol. 6, Wakana and Marin meet a crossdressing cosplayer named Amane at a cosplay event in Ikebukuro and Marin inquires about how he got started, but his reaction is quite unexpected. Later, Marin, who has already cosplayed as a Gothic lolita, magical girl, dark-skinned girl, and a succubus, decides on her next cosplay character! Is Wakana in for a difficult battle?
Notice: This book is written in Japanese.