Biological Mother「実母, Jitsubo?」 is the one-hundred nineteenth chapter of Oshi no Ko manga series. It is written by Aka Akasaka and illustrated by Mengo Yokoyari.
Summary[]
Gotanda and Kaburagi have been invited to a night out When Aqua interrupts Gotanda regarding the deadline on the day. After explaining that he's around town having drinks, Aqua reminds him not to get drunk.
Despite his confidence, Gotanda ends up drunk, and Aqua has to come to pick him up. The ladies try to get Aqua to join them for a bit when he hears a familiar name, Tendouji. Aqua instantly realizes the woman in front of her is Marina Tendouji, Sarina's mother. As Aqua remembers Gorou's memories of Sarina's time at the hospital, he asks about her family to see if he can remind her of Sarina. To his shock, Marina shows him a photo of her with her husband and other children.
Meanwhile, Ruby is rehearsing her lines when she gets stuck with a certain line. Kana points out that the scene involves a parent abandoning their children, emotions that Ruby is having trouble accepting.

