Now, now buddy. It is quite close to reality especially when it comes to circle or group of friends. The other members just felt betrayed or left alone not as an 'idols' but as friends. They already lost someone dear to them and then all of a sudden, the other one decided to leave without proper explanation.
It was hard to all of them. In fact, 'nothing is perfect', not even safeguard soap can beat that phrase
So yeah, just keep on reading
K I'll push on I just thought there had to have been good reasoning like death of a family member or illness that he didnt want to disclose and they're making him a bad guy
I'm on chapter 10 also its dumb how they're making him a villain, if he leaves that's his right plus if u cant stand on your feet when 1 person leaves the group u didnt have what it takes to be an idol it isnt that uncommon for idols to get regrouped if they see it's not going anywhere