春日森 明乃

She is the girlfriend of Sakuya and Tsukumo's friend. She's also their kouhai.

Her best friend is Bibi who is also her classmate. 

She is frank and without genes. When she sees the muscles of Tsukumo when they are at the beach, she does not hesitate to touch him in front of her boyfriend, making him a little jealous.

When Sakuya tries to value himself in her eyes, she doesn't hesitate to devalue him in one or two words, especially by calling into question his night performances ( her tsun-tsun side ) ... She's easly embarassed when her boyfriend is complimenting her and she becomes very cute ( her dere-dere side ).