Lee Sang-min, the secret of his birth that was not registered in his mother's family register → 'Shocked' by the existence of his biological younger sibling

Lee Sang-min confessed that he had a hard time because he was not registered in his mother's family register despite being her biological son. Only immediate family members can conduct funeral proceedings, but Lee Sang-min, who was not registered in his mother's family register, was able to hold his mother's funeral safely only with the help of his maternal uncle.

The unexpected secret about Sangmin's birth was revealed, shocking everyone once again. Sangmin had a younger sibling that he didn't even know existed. Sangmin was shocked to learn of his younger sibling's existence for the first time, saying, "I have a younger sibling?" Then, when the shocking story of why Sangmin couldn't remember his younger sibling was revealed, the Avengers were also said to be speechless.

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