He will leave his group for health reasons.

IN2IT loses a member just six months after debuting.

This week it was announced that the Jinsup member left the group due to health problems, just six months after this group debuted it was announced that Jinsup suffers from the ménière syndrome.
Ménière's disease is a disorder of the inner ear. It can cause severe dizziness, a roaring sound in the ear called tinnitus, loss of hearing that appears and disappears and the sensation of pressure or pain in the ear. It usually affects only one ear. It is a common cause of deafness.
His agency gave a commentary on his departure from the group and Jinsup wrote a farewell letter to his fans promising them that he would take care of himself and they would know about him again soon.