Kusakabe Aiko

She's the protagonist's neighbour in the apartment building and the mother of his childhood friend, Hiroki Kusakabe. She's 38 years old. She was his first love, and the one he still loves to this day.

While she appears gentle, soft-spoken, and easygoing, she's just as strong-willed as Ryoko, having raised her only son, Hiroki, without a single tear.

Until a few years ago, she worked tirelessly alongside the men at a listed company. But thanks to her husband's insurance money, compensation for an accident, and her tireless work at the company, she'd managed to save enough to have a hassle-free wedding after her son went to college...and then she quit.

Ryoko, who was considering hiring more staff due to her busy schedule, offered her work at Miyato Coffee. Now, as the beautiful manager and beautiful waitress of Miyato Coffee, "Ryoko-chan and Aiko-chan," she's the centre of attention for older men.

Like Ryoko, Aiko is teased by young men and even older men in the neighbourhood, but
she brushes it off by saying, "Until Hiroki settles down..." In reality, she's worried about her son, who is a playboy and whose relationships with his girlfriends aren't lasting, but at the same time, she's optimistic.

Like Ryoko, Aiko is also tormented by her sexual desire, which grows stronger with each passing year. Lately, when she watches Makoto or Hiroki from behind while they're working their part-time jobs, she finds herself excited by the feeling of a young, masculine presence in their backs and shoulders.

And on nights when her female self is throbbing, she fills the holes in her body and heart with the adult toys that seem to increase every month, greedily consuming pleasure while groaning like an animal.