Insooni posted on his Instagram page on the 4th, "Choi Jung-in, I'm so sorry, Choi Jung-in, I'm sorry, heartbreaking. How sick It must have been."
In the photo released together, Insooni stands wIth the phrase Choi Jung-in, I'm sorry, we'll change It.' The phrase is 'I want to know It' and Choi Jung-in A Sorry' Challenge by the Korean Children's abuse Prevention Association.
Many CelebrIty, including Insooni, Kim Sang-jung, BTS Ji Min, and Singer Uhm Jung Hwa, joined the Challenge Vonn.
On the other hand, SBS 'It wants to know - Choi Jung-in is dead' on the last two days, and the death of Choi Jung-in, who died after suffering from abuse after being adopted by his adoptive parents at 7 months of age, was broadcast.