From Ilhoon's twitter:
Lee SangBong senior! It was a cool show!! Thank you for inviting us!
[why they were there?]Na Jong Chan, musical actor/model was modeling and he recently singed with Cube. He acted with Eunkwang in Bachelor Vegetable Store musical.
source: fybtob, btobsgsupport, MrsDooB2uty
hugging little fanboy
suddenly sitting in the front row and pretending to be fansite master
source: 비뚜비뚜비, yeon j, minsanity1129
source: btobvnmelody 1, 2, aaeghiioouvy