Nayu's step-brother who has been looking after her since their parents died. He works as an underwear designer and often gets Nayu to test out his latest products.
Keigo Hayama
叶山圭吾
Chu-Bra!!
叶山圭吾
Nayu's step-brother who has been looking after her since their parents died. He works as an underwear designer and often gets Nayu to test out his latest products.
