ONF will appear as a whole on U+Idol Live's Adola School, which will be broadcast live at 7 p.m. on Wednesday, and will give a short-term lecture titled "Summer Vacation Camp."

First of all, MK of ONF will take the first class. He will be an MK teacher who majored in "You Will Love Me" and lecture "Mind Training," which won first place in "Representative Vitamin C Voice" for four consecutive years.

J-Us is in charge of the second class. J-Us will teach "physical training" by dissolving into "when you're tired" teacher J-Us, who has achieved 113 consecutive gold medals in table tennis at the Mangwon Olympics. In particular, J-Us is expected to set up a "mini-Olympic Heaven" section to showcase classes that help boost physical strength and excite competitiveness. Following ONF, Heo Young-Ji and Son Dong-Pyo's live online lecture will be from 10 p.m. on the same day.