燕は戻ってこない

The story centers on Riki, a 29-year-old woman who quits her caregiving job in her Hokkaido hometown and moves to Tokyo to work at a hospital, but the exhausting and irregular job leaves her with financial problems. She hears of a high-paying side gig her colleague Teru. She heads to the Japanese branch of Arte, a specialized American assisted reproductive technology clinic to become a surrogate. (Source: Anime News Network, edited)