SORA

Sora and Umi both played by Lee Taekyung who were born to a Japanese father and a Korean mother and raised in South Korea Sora now lives in Shanghai and works as an illustrator When she meets a Japanese guy named Mochizuki they become close This is when her sibling Umi visits Umi was born intersex and had undergone gender reassignment surgery to become a woman Umi encourages Sora and Mochizuki to fall in love but Sora becomes mentally unstable