My Wonderful Life (2020)

Episode 12 (1x12)

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Mrs. Jo tells Bok Hee about her son, Sang Soo, of how he passed away in a car accident. She asks Bok Hee to move Sang Ah’s room to hers as she doesn’t feel at ease without her. Manager Jang finds out that Bok Hee is the girl who used to deliver milk to the chairman’s house. Director Ko finds out her blood type is AB, which does not match either of her parents, which are O.