Lee Hyori has uploaded a photo proving she attended Bonnek's solo concert.

Lee Hyori on her Instagram account Boy Next Door's

They uploaded a photo proving they attended the solo concert!
As a senior, personally visiting the concert venue to support the junior group Boy Next Door

I think your warm and heartwarming appearance is really impressive.

The Boy Next Door members must know that Lee Hyori came to see them, right?

I hope this helps.