三乃瀬 由々花

"The Queen Childhood Friend Who is Actually a Cosplayer"

The protagonist's childhood friend who lives next to him with her two younger sisters. Due to her cold and piercing gaze, she is super popular within masochistic men. However, the truth is that Yuyuka loves moe and is very naive and timid, and wants to become sadistic. Recently, she has started cosplaying as a maid more often.